45
Министерство Российской федерации
по связи и информатизации
Сибирский государственный университет
телекоммуникаций и информатики
С.Н. Новиков
защита информации
в сетях связи с гарантированным качеством обслуживания
учебное пособие
Новосибирск
2003
УДК 681.327.8(031)+681.3224(031)
С.Н. Новиков. Защита информации в сетях связи с гарантированным
качеством обслуживания / Учебное пособие. Новосибирск: 2003. 84 с.: ил.
Учебное пособие посвящено вопросам защиты информации в сетях связи с
гарантированным качеством обслуживания (ATM и IP v6.0). В частности,
представлены специальные протоколы и механизмы, обеспечивающие защиту
соединений ATM и IP v6.0.
Приведены основные определения, сокращения и выражения, которые часто
встречаются в литературе на английском языке по данной тематике.
При написании учебного пособия использованы материалы ATM Forum, IETF,
монографий, статей отечественных и зарубежных авторов.
Для специалистов в области сетей связи и защиты информации, аспирантов и
студентов старших курсов, обучающихся по специальностям: 200900 – сети
связи и системы коммутации; 201800 – защищенные системы связи.
Каф. РТС
Иллюстраций 33, таблиц 3, приложений 3,
список литературы 16 названий.
Рецензенты:
Утверждено редакционно-издательским советом СибГУТИ
в качестве учебного пособия.
Сибирский государственный университет
телекоммуникаций и информатики, 2003 г.
ОГЛАВЛЕНИЕ
введение 5
1 Общие положения 6
1.1 Основные определения 6
1.2 Требования к системам телекоммуникаций 7
1.2 Классификация нарушений передачи информации 8
1.3 Сервисные службы, профиль защиты и соединения защиты информации 12
Контрольные вопросы 16
2 криптографические системы 18
2.1 Криптосистема с одним ключом 18
2.2 Криптосистемы с открытым ключом 20
2.3 Распределение открытых ключей 23
2.4 Применение криптосистемы с открытым ключом для распределения
секретных ключей 26
2.5 Применение криптосистемы с открытым ключом для аутентификации
пользователя со стороны автономного объекта 29
Контрольные вопросы 31
3 общие критерии оценки безопасности информационных технологий 33
3.1 Целевая направленность общих критериев 33
3.2 Концепция общих критериев 34
3.3 Профили защиты 34
3.4 Нормативные документы оценки безопасности информационных технологий
в Российской Федерации 34
4 защита информации в сетях с технологией ATM 35
4.1 Обмен информацией между агентами защиты 35
4.1 Защита информации в плоскости пользователя 36
4.1 Сервисные службы защиты информации плоскости пользователя 36
4.2 Службы поддержки 38
4.2 Защита информации плоскости управления 41
4.2 Сервисные службы защиты информации плоскости управления 41
4.3 Защита информации плоскости менеджмента 42
4.3 Сервисные службы защиты информации плоскости менеджмента 42
Контрольные вопросы 42
5 защита информации в сетях с технологией IP 43
5.1 43
приложение 1 англо-русский словарь 44
Список сокращений 46
список литературы 47
введение
Ни одна сфера жизни современного общества не может функционировать без
развитой информационной структуры. Национальный информационный ресурс
является сегодня одним из главных источников экономической и военной
мощи государства. Проникая во все сферы деятельности государства,
информация приобретает конкретное политическое, экономическое и
материальное выражение. На этом фоне все более актуальный характер
приобретает в последние десятилетия и, особенно в настоящее время,
задача обеспечения информационной безопасности Российской Федерации как
неотъемлемого элемента ее национальной безопасности, а защита информации
превращается в одну из приоритетных государственных задач.
Вопросы защиты информации всегда занимали особое место в любом обществе
и государстве. В настоящее время, когда сохраняется лавинообразное
распространение компьютерных систем и их взаимодействие посредством
телекоммуникационных сетей, защита информации пользователей и служебной
информации выступает на одно из первых мест.
1 Общие положения
1.1 Основные определения
Введем некоторые понятия и определения, необходимые в дальнейшем.
На рисунке 1.1 приведена классификация основных определений и понятий
предметной области «Защита информации» [1, 2].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0400d31dce02d31dc202a31dc202a31dce020c000000240304007f1dce027f1dc2024f1d
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0400d71cce02d71cc202a71cc202a71cce020c00000024030400831cce02831cc202531c
c202531cce020c000000240304002f1cce022f1cc202ff1bc202ff1bce020c0000002403
0400db1bce02db1bc202ab1bc202ab1bce020c00000024030400871bce02871bc202571b
c202571bce020c00000024030400331bce02331bc202031bc202031bce020c0000002403
0400df1ace02df1ac202af1ac202af1ace020c000000240304008b1ace028b1ac2025b1a
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0400e319ce02e319c202b319c202b319ce020c000000240304008f19ce028f19c2025f19
c2025f19ce020c000000240304003b19ce023b19c2020b19c2020b19ce020c0000002403
0400e718ce02e718c202b718c202b718ce020c000000240304009318ce029318c2026318
c2026318ce020c000000240304003f18ce023f18c2020f18c2020f18ce020c0000002403
0400eb17ce02eb17c202bb17c202bb17ce020c000000240304009717ce029717c2026717
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0400ef16ce02ef16c202bf16c202bf16ce020c000000240304009b16ce029b16c2026b16
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0400f315ce02f315c202c315c202c315ce020c000000240304009f15ce029f15c2026f15
c2026f15ce020c000000240304004b15ce024b15c2021b15c2021b15ce020c0000002403
0400f714ce02f714c202c714c202c714ce020c00000024030400a314ce02a314c2027314
c2027314ce020c000000240304004f14ce024f14c2021f14c2021f14ce020c0000002403
0400fb13ce02fb13c202cb13c202cb13ce020c00000024030400a713ce02a713c2027713
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0400ff12ce02ff12c202cf12c202cf12ce020c00000024030400ab12ce02ab12c2027b12
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04000312ce020312c202d311c202d311ce020c00000024030400af11ce02af11c2027f11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1c000000fb0217ff0000000000009001000000cc0440001254696d6573204e657720526f
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Информация [1] – сведения о лицах, предметах, фактах, событиях, явлениях
и процессах независимо от формы их представления.
Защищаемая информация – информация, являющаяся предметом собственности и
подлежащая защите в соответствии с требованиями правовых документов или
требованиями, устанавливаемыми собственником информации. Собственником
информации может быть: государство, юридическое лицо, группа физических
лиц, отдельное физическое лицо.
Защита информации – деятельность, направленная на предотвращение утечки
защищаемой информации, несанкционированных и непреднамеренных
воздействий на защищаемую информацию.
Защита информации от утечки – деятельность, направленная на
предотвращение неконтролируемого распространения защищаемой информации в
результате ее разглашения, несанкционированного доступа к информации и
получения защищаемой информации разведками.
Защита информации от несанкционированного воздействия – деятельность,
направленная на предотвращение воздействия на защищаемую информацию с
нарушением установленных прав и (или) правил на изменение информации,
приводящего к ее искажению, уничтожению, блокированию доступа к
информации, а также к утрате, уничтожению или сбою функционирования
носителя информации.
Защита информации от непреднамеренного воздействия – деятельность,
направленная на предотвращение воздействия на защищаемую информацию
ошибок ее пользователя, сбоя технических и программных средств
информационных систем, природных явлений или иных нецеленаправленных на
изменение информации мероприятий, приводящих к искажению, уничтожению,
копированию, блокированию доступа к информации, а также к утрате,
уничтожению или сбою функционирования носителя информации.
Защита информации от разглашения – деятельность, направленная на
предотвращение несанкционированного доведения защищаемой информации до
потребителей, не имеющих права доступа к этой информации.
Защита информации от несанкционированного доступа – деятельность,
направленная на предотвращение получения защищаемой информации
заинтересованным субъектом с нарушением установленных правовыми
документами или собственником, владельцем информации прав или правил
доступа к защищаемой информации.
1.2 Требования к системам телекоммуникаций
Приведем основные требования, предъявляемые пользователями к системам
телекоммуникаций с позиций обеспечения защиты передаваемой информации.
Системы телекоммуникаций должны обеспечить:
q конфиденциальность информации – обеспечение просмотра информации в
приемлемом формате только для пользователей, имеющих право доступа к
этой информации;
q целостность информации – обеспечение неизменности информации при ее
передаче;
q аутентичность информации – обеспечение надежной идентификации
источника сообщения, а также гарантия того, что источник не является
поддельным.
q доступность информации – гарантия доступа санкционированных
пользователей к информации.
1.2 Классификация нарушений передачи информации
Нормальная передача информации (рисунок 1.2 а)) в сетях с гарантируемым
качеством обслуживания пользователей подразумевает выполнение трех
этапов (рисунок 1.2 а)) [3, 4].
1. В плоскости менеджмента – формирование и корректировка баз данных
(БД) о состоянии элементов сети. Конечным результатом функционирования
данного этапа является формирование плана распределения информации на
сети – расчет таблиц маршрутизации (ТМ) во всех узлах для каждой службы
электросвязи.
2. В плоскости управления (стек протоколов сигнализации) – организацию
маршрута между узлом – источником (УИ) и узлом – получателем (УП) в виде
виртуального коммутируемого либо постоянного соединения (канала или
тракта). Конечным результатом функционирования данного этапа является
заполнение и обнуление таблиц коммутации (ТК).
3. В плоскости пользователя – непосредственная передача пользовательской
информации.
При этом передача всех видов информации в сети (служебной – для
формирования БД и ТК; пользовательской) осуществляется по своим отдельно
выделенным виртуальным соединениям (каналам и трактам).
Под нарушением передачи информации будем понимать одну из ситуаций,
которые могут быть организованы нарушителем (рисунок 1.3).
· Прерывание или разъединение (рисунок 1. 3. а)). Информация
уничтожается или становится недоступной либо непригодной для
использования. В этом случае нарушается доступность информации. Примером
таких нарушений может быть воздействие нарушителя на элементы сети
(линии связи (ЛС), узлы коммутации (УК), устройства управления, БД и так
далее) с целью их уничтожения или приведение в нерабочее состояние.
· Перехват (рисунок 1. 3. б)). К информации открывается
несанкционированный доступ. Нарушается конфиденциальность передаваемой
информации. Примером такого типа нарушений является несанкционированное
подключение к каналу связи.
picscalex1000100090000038d2b00000b00aa0100000000040000000301080005000000
0b0200000000050000000c02c2058d05040000002e0118001c000000fb02100007000000
0000bc02000000cc0102022253797374656d00058d050000101d120072edc630b0621800
0c0200008d050000040000002d01000004000000020101001c000000fb02e4ff00000000
00009001000000cc0440001254696d6573204e657720526f6d616e000000000000000000
0000000000000000040000002d010100050000000902000000020d000000320a29003a00
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ba03bf030400000002010100040000002d010600050000000902000000020e000000320a
dd03de0302000400bf03ba033004eb03d2ca17001a000d000000320add030f0401000400
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4805e10102000400d401250510026005e12914000d000d000000320a4805020201000400
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5b0576000400000002010100040000002d010600050000000902000000021d000000320a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00002701ffff040000002d010000030000000000
· Модификация (рисунок 1. 3. в)). К информации открывается
несанкционированный доступ с целью изменения информации. При этом
нарушается конфиденциальность передаваемой информации и ее целостность.
Целью такого типа нарушений является изменение информации, передаваемой
по сети.
· Фальсификация (рисунок 1. 3. г)). Нарушитель выдает себя за источник
информации. При этом нарушается аутентичность информации. Примером
такого типа нарушений является отправка поддельных сообщений по сети.
picscalex100010009000003d61f000009008a00000000001400000026060f001e00ffff
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53797374656d000000000a000000040000000000ffffffff010000000000300004000000
2d010000050000000201010000001c000000fb0259ff0000000000009001000000cc0440
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00002d010100050000000902000000020d000000320a030055000100040000000000aa14
172620744c001000000026060f001600ffffffff00004105000064100000b30e0000de12
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650e65126e0e5012770e39127e0e2012840e0612890eeb118c0ecf118e0eb1118f0e9311
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c2105b0eaf10500e9e10440e8f10380e82102b0e78101d0e71100f0e6d10000e6b100400
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Приведенные выше типы нарушений можно разделить на две группы:
q активные;
q пассивные.
К первой группе относятся:
· прерывание – нарушение доступности и конфиденциальности;
· модификация – нарушение целостности;
· фальсификация – нарушение аутентичности.
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0000040000002d0104004600000024032100a50838039e08390397083b0391083e038c08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Данный тип нарушений имеет активный характер воздействия на элементы
сети и передаваемую информацию. Основная цель этих нарушений состоит в
изменении либо уничтожении потоков информации на сети.
К пассивным нарушениям относится перехват с целью получения передаваемой
информации, ее анализа и использования в определенных целях.
Достаточно уверенно можно утверждать, что пассивные нарушения ставят
своей конечной целью переход в группу активных нарушений.
Приведенная выше классификация нарушений защиты информации представлена
в таблице 1.1.
Перечисленные виды нарушений могут иметь место, как в плоскости
пользователя, так и в плоскостях управления и менеджмента (рисунок 1.2
б)). Причем, активные виды нарушений (прерывание, модификация и
фальсификация) в плоскости менеджмента ведут к нарушениям либо
уничтожению информации, хранимой в базах данных УК. В результате
нарушаются таблицы маршрутизации и как результат – невозможность
нормального функционирования плоскостей управления (сигнализации) и
пользователя.
1.3 Сервисные службы, профиль защиты и соединения защиты информации
Сервисные службы защиты информации (рисунок 1.4) являются ответственными
за обеспечение основных требований пользователей, предъявляемых к
телекоммуникационным системам (с точки зрения ее надежности). Причем
данные службы должны функционировать во всех трех плоскостях:
менеджмента, управления и пользовательской.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Совокупность сервисных служб защиты информации, обеспечивающих
требования пользователей, образуют профиль защиты.
За установку и прекращение действия той или иной службы отвечают агенты
защиты (Security Agent , SA). Согласование служб защиты между агентами
происходит через соединения защиты. По этим соединениям производится
обмен информацией защиты.
Рисунок 1.5 демонстрирует самый простой вариант организации соединения
защиты – агенты защиты размещены в пределах конечных систем
пользователей. В данном случае конечные системы и агенты защиты
взаимодействуют с сетью через интерфейс «пользователь – сеть + защита»
(UNI+Sec).
Агенты защиты для виртуального соединения (канала либо тракта), который
установлен между конечными системами пользователей, последовательно
выполняют следующие действия:
· определяют вид сервисных служб защиты, которые должны быть применены к
данному виртуальному соединению;
· согласовывают службы защиты между собой;
· применяют требуемые службы защиты к данному виртуальному соединению.
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Количество соединений защиты должно быть равно количеству установленных
служб защиты. То есть, если для данного виртуального соединения
одновременно требуется аутентификация, конфиденциальность и
достоверность данных, то устанавливается три самостоятельных соединения
защиты.
Рисунок 1.6 показывает другой вариант организации соединения защиты. В
этом случае один агент защиты размещается на конечной системе
пользователя, а другой на коммутаторе виртуальных каналов.
Соответственно, пользователи и агенты защиты взаимодействуют с сетью
связи через интерфейсы «пользователь – сеть» (UNI) либо UNI+Sec;
коммутатор виртуальных каналов через интерфейс «узел – сеть + защита»
(NNI+Sec). В данном случае агент защиты, размещенный в пределах
коммутатора виртуальных каналов, имеет возможность обеспечивать службы
защиты не только для пользователя П2, но и для других узлов и сетей,
которые подсоединяются к данному коммутатору виртуальных каналов. Часто
таких агентов защиты называют брандмауэрами. Фактически брандмауэр – это
шлюз, который выполняет функции защиты сети от несанкционированного
доступа из вне (например, из другой сети).
Различают три типа брандмауэров (рисунок 1.7).
Шлюз уровня приложений часто называют прокси – сервером (proxy server) –
выполняет функции ретранслятора данных для ограниченного числа
приложений пользователя. То есть, если в шлюзе не организована поддержка
того или иного приложения, то соответствующий сервис не предоставляется,
и данные соответствующего типа не могут пройти через брандмауэр.
picscalex1000100090000039f05000008002600000000001400000026060f001e00ffff
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0d000400b00833064e0fd508ece0f0f8f0f3f2e8e7e0f2eef000930067007500b3007500
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040000002d010300040000002d010600090000001d062100f0003403e9060b0677100400
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0c000400da103306ba16d508d8ebfee720f3f0eee2edff20eb007400ae005c003a007500
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1c04b8051c04d304e213d304e213b805040000002d01030004000000f001060007000000
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00000000
Фильтрующий маршрутизатор. Точнее это маршрутизатор, в дополнительные
функции которого входит фильтрование пакетов (packet-filtering router).
Используется на сетях с коммутацией пакетов в режиме дейтаграмм. То
есть, в тех технологиях передачи информации на сетях связи, в которых
плоскость сигнализации (предварительного установления соединения между
УИ и УП) отсутствует (например, IP V 4). В данном случае принятие
решения о передаче по сети поступившего пакета данных основывается на
значениях его полей заголовка транспортного уровня. Поэтому брандмауэры
такого типа обычно реализуются в виде списка правил, применяемых к
значениям полей заголовка транспортного уровня.
Шлюз уровня коммутации – защита реализуется в плоскости управления (на
уровне сигнализации) путем разрешения или запрета тех или иных
соединений.
Для увеличения надежности защиты виртуальных соединений (каналов и
трактов) возможно использование более одной пары агентов защиты и более
одного соединения защиты. В данном случае формируется топология
соединений защиты, в основе которой заложен принцип вложения и не
пересечения соединений защиты вдоль всего маршрута между УИ и УП (или
конечными системами пользователей). Пример принципа вложения и не
пересечения соединений защиты приведен на рисунке 1.8. В данном случае
защита виртуального канала, организованного между конечными системами,
осуществляется четырьмя соединениями защиты и восьмью агентами защиты
(SA1 – SA8). Причем, каждое соединение не знает о существовании других
соединений и не заботится о том, какую службу защиты последние
обеспечивают. То есть, соединения защиты абсолютно независимы друг от
друга. Данный подход позволяет применять многочисленные стратегии и
тактики защиты различных участков сети. Например, соединение защиты
между агентами SA1 и SA8 обеспечивает аутентификацию между конечными
системами. Независимо от данного соединения соединение между SA2 и SA7
обеспечивает конфиденциальность, а SA2, SA3, SA4 и SA4, SA5, SA6
достоверность данных.
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de01f400de01f600d301f600d301f400e701f400f201f400f201f600e701f600e701f400
0400000006010100040000002d010500040000002d01040004000000f001060004000000
2701ffff04000000f0010a00030000001e0008000000fa02000001000000808080000400
00002d01060007000000fc020000808080000000040000002d010a000400000006010200
3b00000038050500050005000500050005001301f9001f01f9001f01fc001301fc001301
f9002701f9003201f9003201fc002701fc002701f9003a01f9004501f9004501fc003a01
fc003a01f9004e01f9005901f9005901fc004e01fc004e01f9006101f9006301f9006301
fc006101fc006101f9000400000006010100040000002d010500040000002d0104000400
0000f001060004000000f0010a0008000000fa0200000100000000000000040000002d01
060007000000fc020000000000000000040000002d010a0004000000060102003b000000
38050500050005000500050005000e01f4001901f4001901f6000e01f6000e01f4002101
f4002c01f4002c01f6002101f6002101f4003501f4004001f4004001f6003501f6003501
f4004801f4005301f4005301f6004801f6004801f4005c01f4005d01f4005d01f6005c01
f6005c01f4000400000006010100040000002d010500040000002d01040004000000f001
0600040000002701ffff04000000f0010a00030000001e0008000000fa02000001000000
80808000040000002d01060007000000fc020000808080000000040000002d010a000400
0000060102003b00000038050500050005000500050005002304f9002e04f9002e04fc00
2304fc002304f9003704f9004204f9004204fc003704fc003704f9004a04f9005504f900
5504fc004a04fc004a04f9005d04f9006904f9006904fc005d04fc005d04f9007104f900
7204f9007204fc007104fc007104f9000400000006010100040000002d01050004000000
2d01040004000000f001060004000000f0010a0008000000fa0200000100000000000000
040000002d01060007000000fc020000000000000000040000002d010a00040000000601
02003b00000038050500050005000500050005001e04f4002904f4002904f6001e04f600
1e04f4003104f4003c04f4003c04f6003104f6003104f4004404f4005004f4005004f600
4404f6004404f4005804f4006304f4006304f6005804f6005804f4006b04f4006d04f400
6d04f6006b04f6006b04f4000400000006010100040000002d010500040000002d010400
04000000f0010600040000002701ffff04000000f0010a00030000001e0008000000fa02
00000100000080808000040000002d01060007000000fc02000080808000000004000000
2d010a0004000000060102003b00000038050500050005000500050005008503f9009003
f9009003fc008503fc008503f9009803f900a303f900a303fc009803fc009803f900ac03
f900b703f900b703fc00ac03fc00ac03f900bf03f900ca03f900ca03fc00bf03fc00bf03
f900d303f900d403f900d403fc00d303fc00d303f9000400000006010100040000002d01
0500040000002d01040004000000f001060004000000f0010a0008000000fa0200000100
000000000000040000002d01060007000000fc020000000000000000040000002d010a00
04000000060102003b00000038050500050005000500050005007f03f4008a03f4008a03
f6007f03f6007f03f4009303f4009e03f4009e03f6009303f6009303f400a603f400b103
f400b103f600a603f600a603f400ba03f400c503f400c503f600ba03f600ba03f400cd03
f400ce03f400ce03f600cd03f600cd03f4000400000006010100040000002d0105000400
00002d01040004000000f0010600040000002701ffff030000001e0008000000fa020000
0200000000000000040000002d010600040000002d0103000800000025030200e600cd00
e6005700040000002d010400040000002d01050004000000f0010600040000002701ffff
030000001e0008000000fa0200000200000000000000040000002d010600040000002d01
030008000000250302001b02cd001b028600040000002d010400040000002d0105000400
0000f0010600040000002701ffff030000001e0008000000fa0200000200000000000000
040000002d010600040000002d01030008000000250302005803cd005803860004000000
2d010400040000002d01050004000000f0010600040000002701ffff030000001e000800
0000fa0200000100000000000000040000002d010600040000002d010a00040000000601
020033000000380503000c0005000500ec00a5001502a5001602a5001602a6001602a700
1502a700ec00a700eb00a700eb00a600eb00a500ec00a500ec00a500ec00a600f100ab00
e600a600f100a000ec00a6001502a6001002a0001b02a6001002ab001502a60004000000
06010100040000002d010500040000002d01040004000000f0010600040000002701ffff
030000001e0008000000fa0200000100000000000000040000002d010600040000002d01
0a00040000000601020033000000380503000c00050005002102a5005203a5005303a500
5303a6005303a7005203a7002102a7002002a7002002a6002002a5002102a5002102a500
2102a6002602ab001b02a6002602a0002102a6005203a6004d03a0005803a6004d03ab00
5203a6000400000006010100040000002d010500040000002d01040004000000f0010600
040000002701ffff030000001e0008000000fa0200000200000000000000040000002d01
0600040000002d0103000800000025030200f603cd00f6035700040000002d0104000400
00002d01050004000000f0010600040000002701ffff030000001e0008000000fa020000
0100000000000000040000002d010600040000002d010a00040000000601020033000000
380503000c0005000500ec006500f0036500f1036600f1036600f1036700f0036800ec00
6800eb006700eb006600eb006600ec006500ec006500ec006600f1006c00e6006600f100
6100ec006600f0036600eb036100f6036600eb036c00f003660004000000060101000400
00002d010500040000002d01040004000000f0010600040000002701ffff030000001e00
08000000fa0200000200000000000000040000002d010600040000002d01030008000000
250302004800cd0048002700040000002d010400040000002d01050004000000f0010600
040000002701ffff030000001e0008000000fa0200000200000000000000040000002d01
0600040000002d01030008000000250302009404cd0094042700040000002d0104000400
00002d01050004000000f0010600040000002701ffff030000001e0008000000fa020000
0100000000000000040000002d010600040000002d010a00040000000601020033000000
380503000c00050005004d0036008f0436009004360090043700900438008f0438004d00
38004d0038004c0037004d0036004d0036004d0036004d00370053003d00480037005300
31004d0037008f043700890431009404370089043d008f04370004000000060101000400
00002d010500040000002d01040004000000f0010600040000002701ffff04000000f001
0a00030000001e0007000000fc020000808080000000040000002d010600040000002d01
07000c00000040092100f0000000000000002f002f0032018a04040000002d0104000400
00002d01050004000000f001060007000000fc020000ffffff000000040000002d010600
040000002d0107000c00000040092100f00000000000000030002f002c01850404000000
2d010400040000002d01050008000000fa0200000200000000000000040000002d010a00
040000002d0103000c0000002403040085042c0185045c01b4045c01b4042c0104000000
2d010400040000002d01050004000000f0010a00040000002701ffff04000000f0010600
030000001e0007000000fc020000808080000000040000002d010600040000002d010700
0c00000040092100f0000000000000002f002f0032013600040000002d01040004000000
2d01050004000000f001060007000000fc020000ffffff000000040000002d0106000400
00002d0107000c00000040092100f00000000000000030002f002c013000040000002d01
0400040000002d01050008000000fa0200000200000000000000040000002d010a000400
00002d0103000c0000002403040030002c0130005c015f005c015f002c01040000002d01
0400040000002d01050004000000f0010a00040000002701ffff04000000f00106000300
00001e0007000000fc020000808080000000040000002d01060004000000060101000400
00002d0107000c00000024030400cc003a01da007101f600710104013a01040000002d01
04000400000006010100040000002d01050004000000f001060007000000fc020000ffff
ff000000040000002d0106000400000006010100040000002d0107000c00000024030400
c7003401d4006b01f0006b01fe003401040000002d010400040000000601010004000000
2d01050008000000fa0200000200000000000000040000002d010a00040000002d010300
0c00000024030400c7003401d4006b01f0006b01fe003401040000002d01040004000000
2d01050004000000f0010a00040000002701ffff04000000f0010600030000001e000700
0000fc020000808080000000040000002d0106000400000006010100040000002d010700
0c0000002403040072013a01800171019c017101aa013a01040000002d01040004000000
06010100040000002d01050004000000f001060007000000fc020000ffffff0000000400
00002d0106000400000006010100040000002d0107000c000000240304006d0134017b01
6b0196016b01a4013401040000002d0104000400000006010100040000002d0105000800
0000fa0200000200000000000000040000002d010a00040000002d0103000c0000002403
04006d0134017b016b0196016b01a4013401040000002d010400040000002d0105000400
0000f0010a00040000002701ffff04000000f0010600030000001e0007000000fc020000
808080000000040000002d0106000400000006010100040000002d0107000c0000002403
040009023a01170271013202710140023a01040000002d01040004000000060101000400
00002d01050004000000f001060007000000fc020000ffffff000000040000002d010600
0400000006010100040000002d0107000c000000240304000302340111026b012d026b01
3b023401040000002d0104000400000006010100040000002d01050008000000fa020000
0200000000000000040000002d010a00040000002d0103000c0000002403040003023401
11026b012d026b013b023401040000002d010400040000002d01050004000000f0010a00
040000002701ffff04000000f0010600030000001e0007000000fc020000808080000000
040000002d0106000400000006010100040000002d0107000c00000024030400a7023a01
b5027101d1027101df023a01040000002d0104000400000006010100040000002d010500
04000000f001060007000000fc020000ffffff000000040000002d010600040000000601
0100040000002d0107000c00000024030400a2023401af026b01cb026b01d90234010400
00002d0104000400000006010100040000002d01050008000000fa020000020000000000
0000040000002d010a00040000002d0103000c00000024030400a2023401af026b01cb02
6b01d9023401040000002d010400040000002d01050004000000f0010a00040000002701
ffff04000000f0010600030000001e0007000000fc020000808080000000040000002d01
06000400000006010100040000002d0107000c0000002403040045033a01530371016f03
71017d033a01040000002d0104000400000006010100040000002d01050004000000f001
060007000000fc020000ffffff000000040000002d010600040000000601010004000000
2d0107000c00000024030400400334014e036b0169036b0177033401040000002d010400
0400000006010100040000002d01050008000000fa020000020000000000000004000000
2d010a00040000002d0103000c00000024030400400334014e036b0169036b0177033401
040000002d010400040000002d01050004000000f0010a00040000002701ffff04000000
f0010600030000001e0007000000fc020000808080000000040000002d01060004000000
06010100040000002d0107000c00000024030400ec033a01fa0371011504710123043a01
040000002d0104000400000006010100040000002d01050004000000f001060007000000
fc020000ffffff000000040000002d0106000400000006010100040000002d0107000c00
000024030400e6033401f4036b0110046b011e043401040000002d010400040000000601
0100040000002d01050008000000fa0200000200000000000000040000002d010a000400
00002d0103000c00000024030400e6033401f4036b0110046b011e043401040000002d01
0400040000002d01050004000000f0010a00040000002701ffff030000001e0007000000
16043d0024031200fa010400000002010100040000002d01010005000000090200000002
28000000320a2c000b0213000400fa01120024033d00d1eee5e4e8ede5ede8e520e7e0f9
e8f2fb20310013000e000c000e000f000f000c000f000f000c0007000b000c0016000f00
0c00130007000e000d000000320a2c00110301000400fa01120024033d0020d60c000400
00002701ffff030000001e000700000016046500850239005b0104000000020101000400
00002d0101000500000009020000000228000000320a53006d01130004005b0139008502
6500d1eee5e4e8ede5ede8e520e7e0f9e8f2fb20320013000e000c000e000f000f000c00
0f000f000c0007000b000c0016000f000c00130007000e000d000000320a530073020100
04005b0139008502650020d60c00040000002701ffff030000001e000700000016049c00
5303710029020400000002010100040000002d0101000500000009020000000228000000
320a8b003b02130004002902710053039c00d1eee5e4e8ede5ede8e520e7e0f9e8f2fb20
340013000e000c000e000f000f000c000f000f000c0007000b000c0016000f000c001300
07000e000d000000320a8b004103010004002902710053039c0020d60c00040000002701
ffff030000001e000700000016049c0017027100ed000400000002010100040000002d01
01000500000009020000000228000000320a8b00fe0013000400ed00710017029c00d1ee
e5e4e8ede5ede8e520e7e0f9e8f2fb20330013000e000c000e000f000f000c000f000f00
0c0007000b000c0016000f000c00130007000e000d000000320a8b00040201000400ed00
710017029c0020d60c00040000002701ffff04000000f0010600030000001e0008000000
fa0200000100000000000000040000002d01060007000000fc0200000000000000000400
00002d010a00040000000601020033000000380503000c00050005004d00920197049201
970493019804930197049401970494014d0094014d0094014c0093014d0093014d009201
4d0092014d009301530099014800930153008e014d0093019704930191048e019c049301
91049901970493010400000006010100040000002d010500040000002d01040004000000
f0010600040000002701ffff030000001e00070000001604990139046e014c0104000000
02010100040000002d0101000500000009020000000226000000320a8801770112000400
4c016e0139049901c2e8f0f2f3e0ebfcedfbe920eae0ede0eb2013000f000e000c000d00
0c000e000d000f0013000f0007000e000c000f000c000e00070010000000320a88016902
030004004c016e013904990141544d0013001000190032000000320a8801a5021a000400
4c016e013904990120ece5e6e4f320eaeeede5f7edfbece820f1e8f1f2e5ece0ece80700
12000c0013000f000d0007000e000e000f000c000e000f00130012000f0007000c000f00
0c000c000c0012000c0012000f000d000000320a88010d04010004004c016e0139049901
20d60d00040000002701ffff030000001e0008000000fa02000002000000000000000400
00002d010600040000002d01030008000000250302009c045c019c049b01040000002d01
0400040000002d01050004000000f0010600040000002701ffff030000001e0008000000
fa0200000200000000000000040000002d010600040000002d0103000800000025030200
48005c0148009b01040000002d010400040000002d01050004000000f001060004000000
2701ffff040000002d010000030000000000
Каждое соединение защиты можно представить в виде сегмента
picscalex1000100090000037501000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02e002200b1200000026060f001a00ffffffff000010000000c0ffffff
b7ffffffe00a0000970200000b00000026060f000c004d617468547970650000a0001c00
0000fb02aafc0901000000009001000000020002001053796d626f6c0077400000002004
0a914c53f5775553f5770100000000003000040000002d01000008000000320a9c010004
010000005b791c000000fb02aafc0901000000009001000000020002001053796d626f6c
00774000000011040a874c53f5775553f5770100000000003000040000002d0101000400
0000f001000008000000320a9c01990a010000005d791c000000fb0240fe000000000000
9001010000000402001054696d6573204e657720526f6d616e004c53f5775553f5770100
000000003000040000002d01000004000000f001010008000000320ad801ac0702000000
534108000000320a2302ff09010000006a4108000000320ad80168040200000053410800
0000320a2302590601000000694108000000320ad801400001000000534108000000320a
23025f01010000006b411c000000fb0240fe000000000000900100000000040200105469
6d6573204e657720526f6d616e004c53f5775553f5770100000000003000040000002d01
010004000000f001000008000000320aa0010607010000002c411c000000fb0240fe0000
000000009001000000020002001053796d626f6c00774000000020040a934c53f5775553
f5770100000000003000040000002d01000004000000f001010008000000320aa001ae02
010000003d410a00000026060f000a00ffffffff0100000000001c000000fb0210000700
00000000bc02000000cc0102022253797374656d000000000a0000000400000000000100
00000100000000003000040000002d01010004000000f0010000030000000000,
где k – порядковый номер соединения защиты; i, j – порядковые номера
агентов защиты.
Для рисунка 1.8 соединения защиты можно записать соответствующими
сегментами: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;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;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;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.
В свою очередь второй сегмент оказывается вложенным в первый. То есть, в
символьной форме это выглядит следующим образом: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.
Не пересечение сегментов
picscalex100010009000003c900000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02000220021200000026060f001a00ffffffff000010000000c0ffffff
e6ffffffe0010000e60100000b00000026060f000c004d61746854797065000060001c00
0000fb0280fe0000000000009001010000000402001054696d6573204e657720526f6d61
6e004c53f5775553f5770100000000003000040000002d01000008000000320a70014000
0100000053791c000000fb0280fe0000000000009001000000000402001054696d657320
4e657720526f6d616e004c53f5775553f5770100000000003000040000002d0101000400
0000f001000008000000320ab0012e010100000033790a00000026060f000a00ffffffff
0100000000001c000000fb021000070000000000bc02000000cc0102022253797374656d
000000000a000000040000000000000000000100000000003000040000002d0100000400
0000f0010100030000000000 и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можно представить в виде:
picscalex1000100090000030501000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c020002a0051200000026060f001a00ffffffff000010000000c0ffffff
e6ffffff60050000e60100000b00000026060f000c004d61746854797065000060001c00
0000fb0280fe0000000000009001010000000402001054696d6573204e657720526f6d61
6e004c53f5775553f5770100000000003000040000002d01000008000000320a7001b103
01000000537908000000320a700140000100000053791c000000fb0280fe000000000000
9001000000000402001054696d6573204e657720526f6d616e004c53f5775553f5770100
000000003000040000002d01010004000000f001000008000000320ab001ab0401000000
347908000000320ab0012e010100000033791c000000fb0280fe00000000000090010000
00020002001053796d626f6c00774000000003040a324c53f5775553f577010000000000
3000040000002d01000004000000f001010008000000320a4001370201000000cb790a00
000026060f000a00ffffffff0100000000001c000000fb021000070000000000bc020000
00cc0102022253797374656d000000000a00000004000000000001000000010000000000
3000040000002d01010004000000f0010000030000000000.
Учитывая, что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 вложены в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, то получим:
picscalex100010009000003cd01000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c024002800a1200000026060f001a00ffffffff000010000000c0ffffff
a6ffffff400a0000e60100000b00000026060f000c004d61746854797065000060001c00
0000fb02cdfde300000000009001000000020002001053796d626f6c007740000000e004
0a854c53f5775553f5770100000000003000040000002d01000008000000320a7f018400
010000005b791c000000fb02cdfde300000000009001000000020002001053796d626f6c
007740000000d6040a884c53f5775553f5770100000000003000040000002d0101000400
0000f001000008000000320a7f011d06010000005d791c000000fb02cdfde30000000000
9001000000020002001053796d626f6c007740000000e0040a864c53f5775553f5770100
000000003000040000002d01000004000000f001010008000000320a7f012c0001000000
5b791c000000fb02cdfde300000000009001000000020002001053796d626f6c00774000
0000d6040a894c53f5775553f5770100000000003000040000002d01010004000000f001
000008000000320a7f01fd09010000005d791c000000fb0280fe00000000000090010100
00000402001054696d6573204e657720526f6d616e004c53f5775553f577010000000000
3000040000002d01000004000000f001010008000000320ab00140080100000053790800
0000320ab001600401000000537908000000320ab001f0000100000053791c000000fb02
80fe0000000000009001000000000402001054696d6573204e657720526f6d616e004c53
f5775553f5770100000000003000040000002d01010004000000f001000008000000320a
f001390901000000327908000000320af001590501000000347908000000320af001dd01
0100000033791c000000fb0280fe0000000000009001000000020002001053796d626f6c
007740000000e0040a884c53f5775553f5770100000000003000040000002d0100000400
0000f001010008000000320a8001c60601000000cc7908000000320a8001e60201000000
cb790a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000
bc02000000cc0102022253797374656d000000000a000000040000000000010000000100
000000003000040000002d01010004000000f0010000030000000000.
Окончательная символьная запись топологии соединений защиты,
представленная на рисунке 1.8, выглядит следующим образом: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.
Из рисунка 1.8 и полученного выражения и видно, что данная топология
соединений защиты виртуального канала между конечными системами имеет
три уровня вложения.
Таким образом:
· принцип вложения и не пересечения соединений защиты;
· предельное количество уровней вложения ( для технологии ATM до 16
уровней)
являются единственными ограничениями организации топологии соединений
защиты для одного виртуального соединения (канала либо тракта).
В тоже время, для топологии защиты, изображенной на рисунке 1.8,
соединение между агентами SA3 и SA5 не возможно, так как нарушается
принцип не пересечения.
Таким образом, топология соединений защиты реализует профиль защиты
пользователя, который является распределенным по сети.
Выбор топологии соединений защиты во многом определяется требованиями
пользователей к степени защищенности передаваемой информации и
ресурсными возможностями самой сети обеспечить данные требования.
Контрольные вопросы
1. Приведите характеристики основных нарушений передачи информации через
телекоммуникационные системы.
2. Почему нарушения в служебных плоскостях (менеджмента и управления)
затрудняют, а порой делают невозможным функционирование пользовательской
плоскости?
3. Дайте определения следующих свойств информации:
· конфиденциальность;
· доступность;
· целостность;
· аутентичность.
4. Какие нарушения относятся к группе активных и какие свойства
информации они нарушают?
5. Назовите основное назначение сервисных служб и соединений защиты
информации.
6. Какие функции выполняют брандмауэры?
7. Какие функции выполняет прокси – сервер?
8. Какие функции выполняют следующие устройства: фильтрующий
маршрутизатор; шлюз уровня коммутации?
9. Какие ограничения накладываются на организацию топологии соединений
защиты?
10. Перечислите основные функции протокола обмена сообщениями защиты.
2 криптографические системы
2.1 Криптосистема с одним ключом
На рисунке 2.1 представлена модель криптосистемы (шифрование и
дешифрование), которую часто называют традиционной, симметричной или с
одним ключом.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Пользователь 1 создает открытое сообщение
picscalex100010009000003c401000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c024002800f1200000026060f001a00ffffffff000010000000c0ffffff
b7ffffff400f0000f70100000b00000026060f000c004d61746854797065000050001c00
0000fb02a6fd0901000000009001000000020002001053796d626f6c007740000000f103
0a834c53f5775553f5770100000000003000040000002d01000008000000320a9e017d03
010000005b791c000000fb02a6fd0901000000009001000000020002001053796d626f6c
007740000000e2030a064c53f5775553f5770100000000003000040000002d0101000400
0000f001000008000000320a9e01e40e010000005d791c000000fb0240fe000000000000
9001010000000402001054696d6573204e657720526f6d616e004c53f5775553f5770100
000000003000040000002d01000004000000f001010008000000320ad801610d01000000
787909000000320aa0016f0b040000002c2e2e2c08000000320ad8010e0a01000000782e
0a000000320aa001ac07050000002c2e2e2e2c0008000000320ad8011a0601000000782e
08000000320aa0017805010000002c2e08000000320ad801100401000000782e08000000
320aa0015c0001000000582e1c000000fb0220ff00000000000090010100000004020010
54696d6573204e657720526f6d616e004c53f5775553f577010000000000300004000000
2d01010004000000f001000008000000320aeb01320e010000006d2e08000000320aeb01
d80a01000000692e1c000000fb0220ff0000000000009001000000000402001054696d65
73204e657720526f6d616e004c53f5775553f5770100000000003000040000002d010000
04000000f001010008000000320aeb01eb0601000000322e08000000320aeb01c8040100
0000312e1c000000fb0240fe0000000000009001000000020002001053796d626f6c0077
40000000e2030a084c53f5775553f5770100000000003000040000002d01010004000000
f001000008000000320aa0012702010000003d2e0a00000026060f000a00ffffffff0100
000000001c000000fb021000070000000000bc02000000cc0102022253797374656d0000
00000a000000040000000000000000000100000000003000040000002d01000004000000
f0010100030000000000,
элементами которого являются символы конечного алфавита. Для шифрования
открытого сообщения X генерируется ключ шифрования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.
С помощью алгоритма шифрования формируется шифрованное сообщение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.
Формальное представление алгоритма шифрования выглядит следующим
образом: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.
Данная запись означает, что Y формируется путем применения алгоритма
шифрования E к открытому сообщению X при использовании ключа шифрования
K.
Шифрованное сообщение Y передается по каналу либо тракту связи к
пользователю 2. Ключ шифрования также передается пользователю 2 по
защищенному (секретному) каналу связи для дальнейшего дешифрования
принятого сообщения Y.
Общий вид математической записи процедуры дешифрования выглядит
следующим образом:
picscalex1000100090000035d01000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02400240081200000026060f001a00ffffffff000010000000c0ffffff
b7ffffff00080000f70100000b00000026060f000c004d61746854797065000050001c00
0000fb02bbfd0901000000009001000000020002001053796d626f6c007740000000e403
0a944c53f5775553f5770100000000003000040000002d01000008000000320a9f01e205
0100000028791c000000fb02bbfd0901000000009001000000020002001053796d626f6c
007740000000f4030a194c53f5775553f5770100000000003000040000002d0101000400
0000f001000008000000320a9f0194070100000029791c000000fb0240fe000000000000
9001010000000402001054696d6573204e657720526f6d616e004c53f5775553f5770100
000000003000040000002d01000004000000f001010008000000320aa001530601000000
597908000000320adc019e0301000000447908000000320aa0015c000100000058791c00
0000fb0220ff0000000000009001010000000402001054696d6573204e657720526f6d61
6e004c53f5775553f5770100000000003000040000002d01010004000000f00100000800
0000320ae801f204010000004b791c000000fb0240fe0000000000009001000000020002
001053796d626f6c007740000000e4030a964c53f5775553f57701000000000030000400
00002d01000004000000f001010008000000320aa0012702010000003d790a0000002606
0f000a00ffffffff0100000000001c000000fb021000070000000000bc02000000cc0102
022253797374656d000000000a0000000400000000000100000001000000000030000400
00002d01010004000000f0010000030000000000.
Приведенная модель предусматривает, что ключ шифрования генерируется там
же, где само сообщение. Однако, возможно и другое решение создания ключа
– ключ шифрования создается третьей стороной (центром распределения
ключей), которой доверяют оба пользователя. В данном случае за доставку
ключа обоим пользователям ответственность несет третья сторона (рисунок
2.2). Вообще говоря, данное решение противоречит самой сущности
криптографии – обеспечение секретности передаваемой информации
пользователей.
picscalex100010009000003b81100000a008200000000001400000026060f001e00ffff
ffff040014000000576f72640e004d6963726f736f667420576f7264050000000b020000
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53797374656d000000000a000000040000000000ffffffff010000000000300004000000
2d010000050000000201010000001c000000fb0238ff0000000000009001000000cc0440
001254696d6573204e657720526f6d616e004c53f5775553f57701000000000030000400
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5f1220745b00050000000201010000000d000000320aea006c000100040000000000ba1b
5f1220745b0007000000fc020000808080000000040000002d01020008000000fa020500
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8b0e01000400c80dc003b20e520520007500040000002701ffff040000002d0107000400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Криптосистемы с одним ключом используют принципы подстановки (замены),
перестановки (транспозиции) и композиции. При подстановке отдельные
символы открытого сообщения заменяются другими символами. Шифрование с
применением принципа перестановки подразумевает изменение порядка
следования символов в открытом сообщении. С целью повышения надежности
шифрования шифрованное сообщение, полученное применением некоторого
шифра, может быть еще раз зашифровано с помощью другого шифра. Говорят,
что в данном случае применен композиционный подход. Следовательно,
симметричные криптосистемы (с одним ключом) можно классифицировать на
системы, которые используют шифры подстановки, перестановки и
композиции.
2.2 Криптосистемы с открытым ключом
Если пользователи при шифровании и дешифровании используют разные ключи
KО и KЗ, то есть: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,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,
то криптосистему называют асимметричной, с двумя ключами или с открытым
ключом.
Алгоритмы криптографии с открытым ключом в отличие от подстановок и
перестановок используют математические функции.
На рисунке 2.3 представлена модель криптосистемы с открытым ключом,
которая обеспечивает конфиденциальность передаваемой информации между
пользователями.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Получатель сообщения (пользователь 2) генерирует связанную пару ключей:
q KО – открытый ключ, который публично доступен и, таким образом,
оказывается доступным отправителю сообщения (пользователь 1);
q KС – секретный, личный ключ, который остается известным только
получателю сообщения (пользователь 1).
Пользователь 1, имея ключ шифрования KО, с помощью алгоритма шифрования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формирует шифрованный текст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.
Пользователь 2, владея секретным ключом Kс, имеет возможность выполнить
обратное преобразование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.
Для обеспечения аутентификации необходимо использовать криптосистему,
изображенную на рисунке 2.4.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В этом случае пользователь 1 готовит сообщение пользователю 2 и перед
отправлением шифрует это сообщение с помощью личного ключа KС.
Пользователь 2 может дешифрировать это сообщение, используя открытый
ключ KО. Так как, сообщение было зашифровано личным ключом отправителя,
то оно может выступать в качестве цифровой подписи. Кроме того, в данном
случае невозможно изменить сообщение без доступа к личному ключу
пользователя 1, поэтому сообщение решает так же задачи идентификации
отправителя и целостности данных.
Для обеспечения аутентификации и конфиденциальности с открытым ключом
необходимо использовать криптосистему, изображенную на рисунке 2.5. В
данном случае пользователь 1 с помощью личного ключа
picscalex95010009000003d100000002001c00000000000500000009020000000005000
000020101000000050000000102ffffff00050000002e0118000000050000000b0200000
000050000000c02600280021200000026060f001a00ffffffff000010000000c0ffffffa
2ffffff40020000020200000b00000026060f000c004d61746854797065000050001c000
000fb0240fe0000000000009001010000cc0402001054696d6573204e657720526f6d616
e004c53f5775553f5770100000000003000040000002d01000008000000320afc0147000
1000000ca791c000000fb0220ff0000000000009001000000000402001054696d6573204
e657720526f6d616e004c53f5775553f5770100000000003000040000002d01010004000
000f001000008000000320a09018c0101000000317908000000320a0802a101010000004
3790a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000b
c02000000cc0102022253797374656d000000000a0000000400000000000000000001000
00000003000040000002d01000004000000f0010100030000000000 шифрует
сообщение. Тем самым обеспечивает цифровую подпись. Затем с
использованием открытого ключа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 пользователя 2
шифрует сообщение, предназначенное для пользователя 2. Так как
шифрованное сообщение может дешифрировать только пользователь 2 личным
ключом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, то это
обеспечивает конфиденциальность передаваемой информации.
Таким образом, криптосистемы с открытым ключом характеризуются тем, что
при шифровании и дешифровании используют два ключа, один из которых
остается в личном пользовании (секретный), а второй открыт для всех
пользователей.
Из вышеизложенного следует, что криптосистемы с открытым ключом должны
удовлетворять следующим условиям:
1. для пользователя процесс генерирования открытого и личного ключей не
должен вызывать вычислительных трудностей;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2. для пользователя, отправляющего сообщение, процесс шифрования с
помощью открытого ключа не должен вызывать вычислительных трудностей;
3. процесс дешифрования, полученного шифрованного сообщения, с помощью
личного ключа не должен вызывать вычислительных трудностей;
4. для противника должны быть значительные вычислительные трудности
восстановления личного ключа из имеющего открытого ключа;
5. для противника должны быть значительные вычислительные трудности
восстановления оригинального сообщения из имеющегося открытого ключа и
шифрованного сообщения.
Таким образом, практическая реализация перечисленных условий сводятся к
нахождению односторонней функции со следующими свойствами:
q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– вычисляется легко, если известны KО и X;
q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– вычисляется легко, если известны KС и Y;
q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– практически не поддается вычислению, если Y известно, а KС – нет.
С подробным описанием различных систем криптографии можно познакомиться
в [7].
2.3 Распределение открытых ключей
На сегодняшний день известны следующие методы распределения открытых
ключей [7]:
q индивидуальное публичное объявление открытых ключей пользователями;
q использование публично доступного каталога открытых ключей;
q участие авторитетного источника открытых ключей;
q сертификаты открытых ключей.
Рассмотрим каждый из перечисленных методов.
При индивидуальном публичном объявлении открытых ключей любая сторона,
участвующая в обмене сообщениями (X), может предоставить свой открытый
ключ (KО) любой другой стороне. Недостатком данного подхода является
невозможность обеспечить аутентификацию отправителя открытого ключа
(KО). То есть, при данном подходе у нарушителя появляется возможность
фальсификации пользователей (рисунок 1. 3 г)).
Использование публично доступного каталога открытых ключей позволяет
добиться более высокой степени защиты информации и пользователей сети. В
данном случае за ведение и распространение публичного каталога должна
отвечать надежная организация (уполномоченный объект) (рисунок 2.6). При
этом должны соблюдаться следующие правила.
1. Пользователи должны регистрировать свои открытые ключи в публичном
каталоге, который ведет уполномоченный объект.
2. Регистрация должна проходить либо по заранее защищенным каналам
связи, либо при личной (физической) явке пользователей на уполномоченный
объект.
3. Уполномоченный объект должен периодически публиковать каталог
открытых ключей. Например, в виде печатной продукции (книга, газета и
тому подобное) либо в электронной версии (размещение на собственном
сервере).
Недостатком данного подхода является следующее. Если нарушителю удастся
изменить записи, хранящиеся в каталоге открытых ключей, то он сможет
авторитетно выдавать фальсифицированные открытые ключи и, следовательно,
выступать от имени любого из участников обмена данными и читать
сообщения, предназначенные любому пользователю.
Участие авторитетного источника открытых ключей представлено на рисунке
2.7. Обязательным условием данного варианта распределения открытых
ключей пользователей является условие, что авторитетный источник
открытых ключей имеет свой секретный ключ, и каждый пользователь знает
его открытый ключ. При этом выполняется следующий порядок действий
(номера, проставленные у стрелочек, совпадают с последовательностью
действий участников обмена сообщениями):
picscalex100010009000003c20c00000d003400000000001400000026060f001e00ffff
ffff040014000000576f72640e004d6963726f736f667420576f7264050000000b020000
0000050000000c02790efa191c000000fb021000070000000000bc02000000cc01020222
53797374656d000000000a000000040000000000ffffffff010000000000300004000000
2d010000050000000201010000001c000000fb0238ff0000000000009001000000cc0440
001254696d6573204e657720526f6d616e004c53f5775553f57701000000000030000400
00002d010100050000000902000000020d000000320a040000000100040000000000fa19
790e20745b0007000000fc020000808080000000040000002d01020008000000fa020500
0100000000000000040000002d010300040000002d010200090000001d062100f000fc05
720faa003b06040000002d01020007000000fc020000ffffff000000040000002d010400
04000000f001020008000000fa0200000000000000000000040000002d01020007000000
fc020000ffffff000000040000002d01050008000000fa0200000c000000000000020400
00002d010600070000001b04800687158f002006040000002d01040004000000f0010500
040000002d01020004000000f0010600030000001e000700000016043c060815d1009e06
050000000201010000001c000000fb0217ff0000000000009001000000cc044000125469
6d6573204e657720526f6d616e004c53f5775553f5770100000000003000040000002d01
05002b000000320ad700ea08150004009e06d10007153c06d3efeeebedeeeceef7e5eded
fbe920eee1fae5eaf269a5007d00750074007d00750093007500750067007d007d009d00
7d003a007500770078006700710066000d000000320ad700bb12010004009e06d1000715
3c0620006a00050000000201010000002c000000320ae6012509160004009e06d1000715
3c0628ede0e4e5e6ede0ff20eef0e3e0ede8e7e0f6e8ff294e007d00670077006700a100
7d0067006b003a0075007500600067007d007d005c0067007d007d006b004e000d000000
320ae6018012010004009e06d10007153c0620006a00040000002701ffff07000000fc02
0000808080000000040000002d010600040000002d010300040000002d01060009000000
1d062100f000ce0114079209e100040000002d010600040000002d01040004000000f001
0600040000002d01020007000000fc020000ffffff000000040000002d01060008000000
fa0200000c00000000000002040000002d010700070000001b043a0bcf077709c6000400
00002d01040004000000f0010600040000002d01020004000000f0010700030000001e00
070000001604f60a5007b909440105000000020101000000040000002d01050005000000
09020000000220000000320ac2094c010e0004004401b9094f07f60acfeeebfce7eee2e0
f2e5ebfc2031a800750074006a005c0075006e0067006600670074006a003a0075000d00
0000320ac2094707010004004401b9094f07f60a20006a00040000002701ffff07000000
fc020000808080000000040000002d010600040000002d010300040000002d0106000900
00001d062100f000ce01140792096209040000002d010600040000002d01040004000000
f0010600040000002d01020007000000fc020000ffffff000000040000002d0106000800
0000fa0200000c00000000000002040000002d010700070000001b043a0b501077094709
040000002d01040004000000f0010600040000002d01020004000000f001070003000000
1e00070000001604f60ad10fb909c60905000000020101000000040000002d0105000500
00000902000000021f000000320ac209e2090d000400c609b909d00ff60acfeeebfce7ee
e2e0f2e5ebfc2000a800750074006a005c0075006e0067006600670074006a003a001c00
0000fb0217ff0000000000009001010000cc0440001254696d6573204e657720526f6d61
6e004c53f5775553f5770100000000003000040000002d0106000d000000320ac309680f
01000400c609b909d00ff60a49004e000d000000320ac309b60f01000400c609b909d00f
f60a20007a00040000002701ffff07000000fc020000808080000000040000002d010700
040000002d010300040000002d010700090000001d062100f000ce01480792091b120400
00002d010700040000002d01040004000000f0010700040000002d01020007000000fc02
0000ffffff000000040000002d01070008000000fa0200000c0000000000000204000000
2d010800070000001b043a0b3d1977090012040000002d01040004000000f00107000400
00002d01020004000000f0010800030000001e00070000001604f60abe18b9097e120500
0000020101000000040000002d010500050000000902000000021f000000320ac2098d12
0d0004007e12b909bd18f60acfeeebfce7eee2e0f2e5ebfc2000a800750074006a005c00
75006e0067006600670074006a003a00040000002d0106000d000000320ac30913180100
04007e12b909bd18f60a4e009b000d000000320ac309ae18010004007e12b909bd18f60a
20007a00040000002701ffff07000000fc020100000000000000040000002d0107000400
00002d010300070000001b04c40a780947099c07040000002d010400040000002d010200
030000001e00070000001604860aff0883091408050000000201010000001c000000fb02
17ff000000000000bc02000000cc0440001254696d6573204e657720526f6d616e004c53
f5775553f5770100000000003000040000002d010800050000000902000000020d000000
320a880914080100040014088309fe08860a8500e9000d000000320a8809fd0801000400
14088309fe08860a20007e00040000002701ffff040000002d010700040000002d010300
070000001b04c40a301247095410040000002d010400040000002d010200030000001e00
070000001604860ab7118309cc1005000000020101000000040000002d01080005000000
0902000000020d000000320a8809cc1001000400cc108309b611860a8500e9000d000000
320a8809b51101000400cc108309b611860a20007e00040000002701ffff100000002606
0f001600ffffffff000062070000ee02000073140000590600000800000026060f000600
ffffffff0000040000002d01030007000000fc020000e1e1e1000000040000002d010900
0c00000024030400da134f06da1386037214ef027214760507000000fc02000098989800
0000040000002d010a0004000000f00109000c00000024030400da1386036c0786032909
ef027214ef0207000000fc020000c4c4c4000000040000002d01090004000000f0010a00
040000002d0103000e000000240305006c0786036c074f06da134f06da1386036c078603
0800000026060f000600ffffffff0100040000002d010200040000002d01040004000000
f00109000800000026060f000600ffffffff0100030000001e000700000016040c065d13
c903eb0705000000020101000000040000002d0108000500000009020000000216000000
320ace03f00b07000400eb07c9035c130c06cae0f2e0ebeee372a9007500720075008300
75006a000d000000320ace03570f01000400eb07c9035c130c0620007e00050000000201
01000000040000002d01080022000000320ade04b0090f000400eb07c9035c130c06cef2
eaf0fbf2fbf520eaebfef7e5e900b500720086008200b6007200b60075003a0086008300
b200830067008600040000002d0105000d000000320ae204971101000400eb07c9035c13
0c0620006a00040000002701ffff1000000026060f001600ffffffff0000380c0000a706
00004f0d000069090000040000002d01030007000000fc02000080808000000004000000
2d0109001200000024030700600c76079c0c76079c0c0009120d0009120d76074e0d7607
d70ccf060c000000240304009c0c3f09120d3f09120d15099c0c15090c00000024030400
9c0c6809120d6809120d54099c0c5409040000002d010200040000002d01040004000000
f001090008000000fa0200000c00000000000000040000002d01090007000000fc020000
ffffff000000040000002d010a0012000000240307003f0c54077a0c54077a0cdf08f10c
df08f10c54072c0d5407b60cae060c000000240304007a0c1d09f10c1d09f10cf4087a0c
f4080c000000240304007a0c4709f10c4709f10c32097a0c3209040000002d0102000400
0000f0010900040000002d01040004000000f0010a000800000026060f000600ffffffff
01001000000026060f001600ffffffff000094070000ed060000320a0000220900000400
00002d01030007000000fc020000808080000000040000002d0109001200000024030700
5209300778095e0719087a086408d708c209bb07e809e907310a15070c00000024030400
e207a7082c0803095108e608060889080c00000024030400bd07c508070821091a081209
cf07b608040000002d010200040000002d01040004000000f001090008000000fa020000
0c00000000000000040000002d01090007000000fc020000ffffff000000040000002d01
0a00120000002403070031090f0756093d07f80759084208b508a1099907c609c7070f0a
f4060c00000024030400c00786080b08e2083008c408e50768080c000000240304009b07
a408e6070009f807f108ae079508040000002d01020004000000f0010900040000002d01
040004000000f0010a000800000026060f000600ffffffff01001000000026060f001600
ffffffff000079100000b50600000a130000fa080000040000002d01030007000000fc02
0000808080000000040000002d0109001200000024030700e410b3070b1186076212ac08
af12510858112c077f11ff06a110de060c000000240304009812da08e5128008c1126108
7412bb080c00000024030400bc12f90809139e08f7128f08aa12e908040000002d010200
040000002d01040004000000f001090008000000fa0200000c0000000000000004000000
2d01090007000000fc020000ffffff000000040000002d010a001200000024030700c310
9207ea10650740128a088e12300837110b075d11de068010bc060c000000240304007712
b908c4125e08a0123f0852129a080c000000240304009b12d708e8127d08d6126e088912
c808040000002d01020004000000f0010900040000002d01040004000000f0010a000800
000026060f000600ffffffff0100040000002d010700040000002d010300070000001b04
7a0eaf18810bee00040000002d010400040000002d010200030000001e00070000001604
3c0e3618bd0b650105000000020101000000040000002d01050005000000090200000002
1d000000320ac60b0e040c0004006501bd0b35183c0ed0e8f1f3edeeea20322e36208200
7d00670075007d00750071003a0075003a0075003a000d000000320ac60be40801000400
6501bd0b35183c0e9600750034000000320ac60b59091b0004006501bd0b35183c0e20cf
f3e1ebe8eae0f6e8ff20eef2eaf0fbf2fbf520eaebfef7e5e9023a00a800750077007400
7d00710067007d007d006b003a0075006600710075009d0066009d0075003a0071007400
ae00750067007d000d000000320ac60b8b15010004006501bd0b35183c0e20006a000400
00002701ffff07000000fc020000ffffff000000040000002d010900040000002d010300
040000002d010900090000001d062100f00031022c03de06a404040000002d0109000400
00002d01040004000000f0010900040000002d010200030000001e00070000001604d208
58071a071b050500000002010100000005000000090200000002040000002d0105000300
00001e00070000001604d20857071a071b05030000001e00070000001604d40857071907
1b051000000026060f001600ffffffff00001a0500001907000058070000d50800000300
00001e00050000002e0100000000050000000a0200000000050000000902000000000500
00000102ffffff00040000002d010700040000002d010300040000000301080007000000
1204790eba01fa193c02050000000b0234f56ef9050000000c02a002e002050000000902
0000000005000000020101000000050000000102ffffff00050000002e01180000000500
00000c02a002e0021200000026060f001a00ffffffff000010000000c0ffffffb3ffffff
a0020000530200000b00000026060f000c004d61746854797065000060001c000000fb02
40fe0000000000009001010000000402001054696d6573204e657720526f6d616e004c53
f5775553f5770100000000003000040000002d010900050000000b0234f56ef908000000
320a4d024700010000004b041c000000fb0220ff0000000000009001000000cc04020010
54696d6573204e657720526f6d616e004c53f5775553f577010000000000300004000000
2d010a0004000000f001090008000000320af800a80102000000cf3108000000320a5902
a40101000000ce310a00000026060f000a00ffffffff0100000000001c000000fb021000
070000000000bc02000000cc0402022253797374656d00774000000079040a554c53f577
5553f5770100000000003000040000002d01090004000000f0010a00040000002d010400
040000002d010200040000002701ffff0800000026060f000600ffffffff010004000000
2701ffff040000002701ffff0d000000320a9f075707010004001b051a075707d2082000
6a00040000002701ffff07000000fc020000ffffff000000040000002d010a0004000000
2d010300040000002d010a00090000001d062100f0000d023a030d075c0d040000002d01
0a00040000002d01040004000000f0010a00040000002d010200030000001e0007000000
1604dd081e104907d40d0500000002010100000005000000090200000002040000002d01
0500030000001e00070000001604dd081d104907d40d1000000026060f001600ffffffff
0000d30d0000480700001f100000df080000030000001e00050000002e01000000000500
00000a020000000005000000090200000000050000000102ffffff00040000002d010700
040000002d0103000400000003010800070000001204790e9501fa194a02050000000b02
e9f3a2ee050000000c02a002e00205000000090200000000050000000201010000000500
00000102ffffff00050000002e0118000000050000000c02a002e0021200000026060f00
1a00ffffffff000010000000c0ffffffb3ffffffa0020000530200000b00000026060f00
0c004d61746854797065000060001c000000fb0240fe0000000000009001010000000402
001054696d6573204e657720526f6d616e004c53f5775553f57701000000000030000400
00002d010a00050000000b02e9f3a2ee08000000320a4d024700010000004b311c000000
fb0220ff0000000000009001000000cc0402001054696d6573204e657720526f6d616e00
4c53f5775553f5770100000000003000040000002d010b0004000000f0010a0008000000
320af800a80102000000cf4908000000320a5902a40101000000ce490a00000026060f00
0a00ffffffff0100000000001c000000fb021000070000000000bc02000000cc04020222
53797374656d00774000000079040a574c53f5775553f577010000000000300004000000
2d010a0004000000f0010b00040000002d010400040000002d010200040000002701ffff
0800000026060f000600ffffffff0100040000002701ffff0d000000320aa9071e100100
0400d40d49071d10dd0820006a00040000002701ffff07000000fc020000ffffff000000
040000002d010b00040000002d010300040000002d010b00090000001d062100f0004502
65030d071d13040000002d010b00040000002d01040004000000f0010b00040000002d01
0200030000001e0007000000160415090a16490795130500000002010100000005000000
090200000002040000002d010500030000001e0007000000160415090916490795131000
000026060f001600ffffffff000094130000480700000b16000017090000030000001e00
050000002e0100000000050000000a020000000005000000090200000000050000000102
ffffff00040000002d010700040000002d0103000400000003010800070000001204790e
cd01fa197502050000000b0261f519e6050000000c02a002400305000000090200000000
05000000020101000000050000000102ffffff00050000002e0118000000050000000c02
a00240031200000026060f001a00ffffffff000010000000c0ffffffb3ffffff00030000
530200000b00000026060f000c004d61746854797065000060001c000000fb0240fe0000
000000009001010000000402001054696d6573204e657720526f6d616e004c53f5775553
f5770100000000003000040000002d010b00050000000b0261f519e608000000320a4d02
4700010000004b491c000000fb0220ff0000000000009001000000cc0402001054696d65
73204e657720526f6d616e004c53f5775553f5770100000000003000040000002d010c00
04000000f0010b0008000000320af800a80102000000cf4e08000000320a5902a4010100
0000ce4e0a00000026060f000a00ffffffff0100000000001c000000fb02100007000000
0000bc02000000cc0402022253797374656d00774000000079040a594c53f5775553f577
0100000000003000040000002d010b0004000000f0010c00040000002d01040004000000
2d010200040000002701ffff0800000026060f000600ffffffff0100040000002701ffff
050000000201010000000d000000320a1c09951301000400951349070916150920006a00
040000002701ffff040000002d010000030000000000
1. Пользователь 1 посылает запрос авторитетному источнику открытых
ключей о текущем значении открытого ключа пользователя 2. При этом
указывается дата и время запроса (д. вр.).
2. Авторитетный источник, используя свой секретный ключ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, шифрует и
передает сообщение пользователю 1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, в котором содержится
следующая информация:
q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 – открытый ключ
пользователя 2;
q д. вр. – дата и время отправки сообщения.
3. Пользователь 1, используя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, шифрует и
передает пользователю 2 шифрованное сообщение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, содержащее:
q ID1 – идентификатор отправителя (пользователь 1);
q N1 – уникальную метку данного сообщения.
4, 5. Пользователь 2, получив шифрованное сообщение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, дешифрирует его с
помощью своего секретного ключа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picscalex1000100090000033502000002001c0000000000050000000902000000000500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 и в соответствии с
идентификатором ID1, аналогично с пунктами 1 и 2 выше перечисленных
действий получает от авторитетного источника открытый ключ пользователя
1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.
6. Пользователь 2, используя
picscalex98010009000003d100000002001c00000000000500000009020000000005000
000020101000000050000000102ffffff00050000002e0118000000050000000b0200000
000050000000c022002e0021200000026060f001a00ffffffff000010000000c0ffffffb
7ffffffa0020000d70100000b00000026060f000c004d61746854797065000040001c000
000fb0240fe0000000000009001010000000402001054696d6573204e657720526f6d616
e004c53f5775553f5770100000000003000040000002d01000008000000320adc0147000
10000004b791c000000fb0220ff0000000000009001000000cc0402001054696d6573204
e657720526f6d616e004c53f5775553f5770100000000003000040000002d01010004000
000f001000008000000320af600a40102000000cf3108000000320adb01a00101000000c
e310a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000b
c02000000cc0102022253797374656d000000000a0000000400000000000000000001000
00000003000040000002d01000004000000f0010100030000000000, посылает
пользователю 1 шифрованное сообщение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, где N2 – уникальная
метка данного сообщения.
7. Пользователь 1 шифрует с помощью открытого ключа
picscalex99010009000003d100000002001c00000000000500000009020000000005000
000020101000000050000000102ffffff00050000002e0118000000050000000b0200000
000050000000c02200200031200000026060f001a00ffffffff000010000000c0ffffffb
7ffffffc0020000d70100000b00000026060f000c004d61746854797065000040001c000
000fb0240fe0000000000009001010000000402001054696d6573204e657720526f6d616
e004c53f5775553f5770100000000003000040000002d01000008000000320adc0147000
10000004b791c000000fb0220ff0000000000009001000000cc0402001054696d6573204
e657720526f6d616e004c53f5775553f5770100000000003000040000002d01010004000
000f001000008000000320af600a40102000000cf3208000000320adb01a00101000000c
e320a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000b
c02000000cc0102022253797374656d000000000a0000000400000000000000000001000
00000003000040000002d01000004000000f0010100030000000000 сообщение Y,
предназначенное пользователю 1 и передает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.
Приведенный вариант распределения открытых ключей имеет некоторые
недостатки: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f0010c0009000000320a0d01cb0201000000330009001c000000fb02f2ff000000000000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q каждый раз, когда пользователь намерен передать информацию новому
адресату, то он должен обращаться к авторитетному источнику с целью
получения открытого ключа;
q каталог имен и открытых ключей, поддерживаемый авторитетным
источником, является привлекательным местом для нарушителя передачи
информации пользователей.
На рисунке 2.8 представлен сценарий распределения открытых ключей с
применением сертификатов открытых ключей. Обязательным условием данного
варианта распределения открытых ключей пользователей является условие,
что авторитетный источник сертификатов имеет свой секретный ключ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, и каждый
пользователь знает его открытый ключ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. При этом
выполняется следующий порядок действий (номера, проставленные у
стрелочек, совпадают с последовательностью действий участников обмена
сообщениями):
1. Пользователь 1 генерирует пару ключей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 (соответственно, открытый и секретный)
и по защищенному каналу связи обращается к авторитетному источнику
сертификатов с целью получения сертификата.
2. Авторитетный источник шифрует с помощью своего секретного ключа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сертификат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 и выдает его пользователю 1. Сертификат
содержит:
q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 – открытый ключ
пользователя 1 (данный ключ пользователь 1 сам сгенерировал и передал
авторитетному источнику для сертификации);
q IDП1 – идентификатор пользователя 1;
q TП1 – срок действия сертификата пользователя.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0100010000000000bc02000000cc0702022253797374656d000000000000000000000000
0000000000000000000000000000040000002d010c0004000000f0010d00040000002d01
0500040000002d010600040000002d01010004000000f0010c00040000002d0106000400
00002d010500040000002701ffff040000002d010a0004000000f0010b00040000002701
ffff040000002701ffff040000002701ffff0d000000320a400117040100040079021701
1e04760120000f00040000002701ffff030000001e00040000002d010200040000002d01
04000c00000040092100f0000000000000005000c301db01f401040000002d0105000400
00002d010600040000002701ffff030000001e000700000016042102ab03e50103020400
00000201010005000000090200000002040000002d010100030000001e00070000001604
2102ab03e5010302030000001e00040000002c010000030000001e00030000001e000400
00002d010500040000002d010600040000002e0100000500000009020000000005000000
0102ffffff000400000004010d001c000000fb02fdff0000000000009001000000cc0740
001254696d6573204e657720526f6d616e00000000000000000000000000000000000400
00002d010b00050000000902000000000400000002010100050000000102ffffff000400
00002e0118001c000000fb02c2ff1900000000009001000000020702001053796d626f6c
0000000000000000000000000000000000000000000000000000040000002d010c000900
0000320a1102aa02010000005b000e001c000000fb02c2ff190000000000900100000002
0702001053796d626f6c0000000000000000000000000000000000000000000000000000
040000002d010d0004000000f0010c0009000000320a11029503010000005d000e001c00
0000fb02d4ff0000000000009001010000cc0702001054696d6573204e657720526f6d61
6e0000000000000000000000000000000000040000002d010c0004000000f0010d000900
0000320a17025d0301000000d20018001c000000fb02d4ff000000000000900101000000
0702001054696d6573204e657720526f6d616e0000000000000000000000000000000000
040000002d010d0004000000f0010c000a000000320a170206030200000049440f002000
09000000320a1702b702010000004b001d0009000000320a170272020100000045001b00
1c000000fb02d4ff0000000000009001010000cc0702001054696d6573204e657720526f
6d616e0000000000000000000000000000000000040000002d010c0004000000f0010d00
09000000320a17020d0201000000d1001d001c000000fb02eaff00000000000090010000
00cc0702001054696d6573204e657720526f6d616e000000000000000000000000000000
0000040000002d010d0004000000f0010c000a000000320a18027a0302000000cf320f00
0b000a000000320a1802330302000000cf320f000b000a000000320aff01d80202000000
cf320f000b0009000000320a1802d80201000000ce00100009000000320aff018e020100
0000c00010001c000000fb02eaff0000000000009001000000000702001054696d657320
4e657720526f6d616e0000000000000000000000000000000000040000002d010c000400
0000f0010d0009000000320a18028e02010000004b000f001c000000fb02eaff00000000
00009001000000cc0702001054696d6573204e657720526f6d616e000000000000000000
0000000000000000040000002d010d0004000000f0010c0009000000320a18029d020100
0000f1000a000a000000320a19022c0202000000cf320f000b001c000000fb02d4ff0000
000000009001000000000702001054696d6573204e657720526f6d616e00000000000000
00000000000000000000040000002d010c0004000000f0010d0009000000320a11025103
010000002c000b0009000000320a1102f602010000002c000b001c000000fb02d4ff0000
000000009001000000020702001053796d626f6c00000000000000000000000000000000
00000000000000000000040000002d010d0004000000f0010c0009000000320a11025002
010000003d0018001c000000fb020200010000000000bc02000000cc0702022253797374
656d0000000000000000000000000000000000000000000000000000040000002d010c00
04000000f0010d00040000002d010500040000002d010600040000002d01010004000000
f0010c00040000002d010600040000002d010500040000002701ffff040000002d010a00
04000000f0010b00040000002701ffff040000002701ffff040000002701ffff0d000000
320a1302a403010004000302e501ab03210220000f00040000002701ffff040000002d01
0000030000000000
3. Пользователь 1 пересылает свой сертификат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, полученный от авторитетного источника,
пользователю 2. Последний, зная открытый ключ авторитетного источника
сертификатов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, имеет
возможность прочитать и удостовериться, что полученное сообщение
является сертификатом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.
4. 4, 5, 6. Пользователь 2 выполняет аналогичные действия, которые были
выполнены пользователем 1 в пунктах 1, 2 и 3. То есть получает от
авторитетного источника сертификат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. Пересылает его пользователю 1.
Последний, зная открытый ключ авторитетного источника сертификатов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, имеет
возможность прочитать и удостовериться, что полученное сообщение
является сертификатом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.
В результате перечисленных действий пользователи обменялись открытыми
ключами и готовы к передаче и приему пользовательских сообщений.
2.4 Применение криптосистемы с открытым ключом для распределения
секретных ключей
На сегодняшний день существует несколько подходов применения
криптосистемы с открытым ключом для распределения секретных ключей [7].
Рассмотрим некоторые из них.
Простое распределение секретных ключей состоит в выполнении следующих
действий:
1. Пользователь 1 генерирует пару ключей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, соответственно, открытый и секретный.
2. Пользователь 1 передает пользователю 2 сообщение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, где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 – идентификатор пользователя 1.
3. Пользователь 2, получив сообщение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 от пользователя 1, так же генерирует свою пару
ключей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.
4. Пользователь 2, используя открытый ключ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пользователя 1,
шифрует и передает сообщение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 пользователю 1.
5. Пользователь 1 уничтожает свой секретный ключ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, а пользователь
2 уничтожает открытый ключ пользователя 1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.
Таким образом, оба пользователя имеют сеансовый (секретный) ключ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и могут
использовать его для передачи информации, защищенной традиционным
шифрованием. По окончании сеанса передачи информации ключ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 уничтожается.
Однако данный подход уязвим для активных нарушений. Действительно, если
нарушитель имеет возможность внедрения в соединение между
пользователями, то, выполняя следующие действия (рисунок 2.9), он будет
иметь возможность знать секретный (сеансовый) ключ.
1. Пользователь 1 генерирует пару ключей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 и передает пользователю 2 сообщение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.
2. Нарушитель перехватывает сообщение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, создает собственную пару ключей
picscalex1000100090000036d01000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02600260061200000026060f001a00ffffffff000010000000c0ffffff
a2ffffff20060000020200000b00000026060f000c004d61746854797065000050001c00
0000fb028efd0901000000009001000000020002001053796d626f6c007740000000f703
0a554c53f5775553f5770100000000003000040000002d01000008000000320abc012700
010000005b791c000000fb028efd0901000000009001000000020002001053796d626f6c
007740000000ff030a4a4c53f5775553f5770100000000003000040000002d0101000400
0000f001000008000000320abc01b905010000005d791c000000fb0240fe000000000000
9001010000000402001054696d6573204e657720526f6d616e004c53f5775553f5770100
000000003000040000002d01000004000000f001010008000000320afc01a60301000000
4b7908000000320afc01b000010000004b791c000000fb0220ff00000000000090010000
00cc0402001054696d6573204e657720526f6d616e004c53f5775553f577010000000000
3000040000002d01010004000000f001000008000000320a0901020501000000cd790800
0000320a0802fe0401000000d17908000000320a09010c0201000000cd7908000000320a
0802080201000000ce791c000000fb0240fe000000000000900100000000040200105469
6d6573204e657720526f6d616e004c53f5775553f5770100000000003000040000002d01
000004000000f001010008000000320ac001ec02010000002c790a00000026060f000a00
ffffffff0100000000001c000000fb021000070000000000bc02000000cc010202225379
7374656d000000000a000000040000000000010000000100000000003000040000002d01
010004000000f0010000030000000000 и передает пользователю 2 сообщение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.
3. Пользователь 2, получив сообщение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, генерирует свою пару ключей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, шифрует (используя открытый ключ
нарушителя
picscalex100010009000003d100000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02a00280021200000026060f001a00ffffffff000010000000c0ffffff
b3ffffff40020000530200000b00000026060f000c004d61746854797065000060001c00
0000fb0240fe0000000000009001010000000402001054696d6573204e657720526f6d61
6e004c53f5775553f5770100000000003000040000002d01000008000000320a4d024700
010000004b791c000000fb0220ff0000000000009001000000cc0402001054696d657320
4e657720526f6d616e004c53f5775553f5770100000000003000040000002d0101000400
0000f001000008000000320af800a30101000000cd7908000000320a59029f0101000000
ce790a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000
bc02000000cc0102022253797374656d000000000a000000040000000000000000000100
000000003000040000002d01000004000000f0010100030000000000) и передает
сообщение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 пользователю 1.
4. Нарушитель перехватывает сообщение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, дешифрирует его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, определяет сеансовый ключ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 и передает
пользователю 2 сообщение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.
В результате оба пользователя имеют сеансовый ключ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, однако не
будут подозревать, что он тоже известен и нарушителю.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00009001000000cc0702001054696d6573204e657720526f6d616e000000000000000000
0000000000000000040000002d010b0004000000f0010c000a000000320a6000a6010200
0000cf320e000a000a000000320a3800f10102000000cf320e000a0009000000320a6100
f00101000000d1000e000a000000320a5d00e30002000000cf320e000a001c000000fb02
f2ff0000000000009001000000cc0702001054696d6573204e657720526f6d616e000000
0000000000000000000000000000040000002d010c0004000000f0010b000a000000320a
50005e0102000000cf310900070009000000320a67005d0101000000ce000a001c000000
fb02ddff0000000000009001000000020702001053796d626f6c00000000000000000000
00000000000000000000000000000000040000002d010b0004000000f0010c0009000000
320a50000701010000003d0013001c000000fb020100010000000000bc02000000cc0702
022253797374656d00000000000000000000000000000000000000000000000000000400
00002d010c0004000000f0010b00040000002d010500040000002d010600040000002d01
010004000000f0010c00040000002d010600040000002d010500040000002701ffff0400
00002d010a0004000000f0010900040000002701ffff040000002701ffff040000002701
ffff040000002d0107000d000000320a51001a0201000400bf00230021029b0020001200
040000002701ffff030000001e000700000016049b0022042300cc020400000002010100
05000000090200000002040000002d010100030000001e000700000016049b0022042300
cc02030000001e00040000002c010000030000001e00030000001e00040000002d010500
040000002d010600040000002e01000005000000090200000000050000000102ffffff00
0400000004010d001c000000fb02fdff0000000000009001000000cc0740001254696d65
73204e657720526f6d616e0000000000000000000000000000000000040000002d010900
050000000902000000000400000002010100050000000102ffffff00040000002e011800
1c000000fb02b2ff1600000000009001000000020702001053796d626f6c000000000000
0000000000000000000000000000000000000000040000002d010b0009000000320a5000
7b03010000005b000c001c000000fb02b2ff160000000000900100000002070200105379
6d626f6c0000000000000000000000000000000000000000000000000000040000002d01
0c0004000000f0010b0009000000320a50001004010000005d000c001c000000fb02ddff
0000000000009001010000000702001054696d6573204e657720526f6d616e0000000000
000000000000000000000000040000002d010b0004000000f0010c0009000000320a5700
d603010000004b0016000a000000320a5e0083030200000049440c00190009000000320a
5b003203010000004500150009000000320a65004c03010000004b00160009000000320a
5b00d50201000000590013001c000000fb02ddff00000000000090010000000007020010
54696d6573204e657720526f6d616e000000000000000000000000000000000004000000
2d010c0004000000f0010b0009000000320a5700c903010000002c0009001c000000fb02
ecff0000000000009001000000cc0702001054696d6573204e657720526f6d616e000000
0000000000000000000000000000040000002d010b0004000000f0010c000a000000320a
6000ab0302000000cf320e000a000a000000320a3800f40302000000cf320e000a000900
0000320a6100f30301000000d1000d000a000000320a5d00ef0202000000cf320e000a00
1c000000fb02f2ff0000000000009001000000cc0702001054696d6573204e657720526f
6d616e0000000000000000000000000000000000040000002d010c0004000000f0010b00
09000000320a5000690301000000cd00090009000000320a6700690301000000ce000a00
1c000000fb02ddff0000000000009001000000020702001053796d626f6c000000000000
0000000000000000000000000000000000000000040000002d010b0004000000f0010c00
09000000320a50001303010000003d0013001c000000fb020100010000000000bc020000
00cc0702022253797374656d000000000000000000000000000000000000000000000000
0000040000002d010c0004000000f0010b00040000002d010500040000002d0106000400
00002d01010004000000f0010c00040000002d010600040000002d010500040000002701
ffff040000002d010a0004000000f0010900040000002701ffff040000002701ffff0400
00002701ffff040000002d0107000d000000320a51001b0401000400cc02230022049b00
20001200040000002701ffff040000002d010000030000000000
Сценарий распределения секретных ключей с обеспечением
конфиденциальности и аутентичности изображен на рисунке 2.10 и состоит в
выполнении следующих действий.
1. Пользователи генерируют пары ключей, соответственно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,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, и обмениваются между собой открытыми
ключами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 и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.
2. Пользователь 1, используя
picscalex100010009000003d100000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02c002c0021200000026060f001a00ffffffff000010000000c0ffffff
a9ffffff80020000690200000b00000026060f000c004d61746854797065000070001c00
0000fb0280fe0000000000009001010000000402001054696d6573204e657720526f6d61
6e00be62f577c762f5770100000000003000040000002d01000008000000320a5d024600
010000004b791c000000fb0220ff0000000000009001000000cc0402001054696d657320
4e657720526f6d616e00be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320a0201750102000000cf3208000000320a6f02710101000000
ce320a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000
bc02000000cc0102022253797374656d000000000a000000040000000000000000000100
000000003000040000002d01000004000000f0010100030000000000, передает
пользователю 2 сообщение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, содержащее: свой
идентификатор – IDП1;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 – уникальная метка данного сообщения.
3. Пользователь 2, используя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, передает
пользователю 1 сообщение
picscalex100010009000003dd01000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c026003200c1200000026060f001a00ffffffff000010000000c0ffffff
baffffffe00b00001a0300000b00000026060f000c004d617468547970650000b0001c00
0000fb029efce300000000009001000000020002001053796d626f6c0077400000009e05
0a14be62f577c762f5770100000000003000040000002d01000008000000320afc016507
010000005b791c000000fb029efce300000000009001000000020002001053796d626f6c
00774000000061050a26be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320afc01a10b010000005d791c000000fb0280fe000000000000
9001010000000402001054696d6573204e657720526f6d616e00be62f577c762f5770100
000000003000040000002d01000004000000f001010008000000320a4c02010a01000000
4e7908000000320a9602c107010000004e7908000000320a7d02f4030100000045790800
0000320aea020305010000004b7908000000320a7d0222000100000059791c000000fb02
80fe0000000000009001000000000402001054696d6573204e657720526f6d616e00be62
f577c762f5770100000000003000040000002d01010004000000f001000008000000320a
4c027509010000002c791c000000fb0220ff000000000000900100000000040200105469
6d6573204e657720526f6d616e00be62f577c762f5770100000000003000040000002d01
000004000000f001010008000000320aae02f00801000000327908000000320ac002170b
0100000031791c000000fb0220ff0000000000009001000000cc0402001054696d657320
4e657720526f6d616e00be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320a0202320602000000cf3108000000320a0c032e0601000000
ce3108000000320a8f022e0102000000cf321c000000fb0280fe00000000000090010000
00020002001053796d626f6c0077400000009e050a17be62f577c762f577010000000000
3000040000002d01000004000000f001010008000000320a0002ab02010000003d320a00
000026060f000a00ffffffff0100000000001c000000fb021000070000000000bc020000
00cc0102022253797374656d000000000a00000004000000000001000000010000000000
3000040000002d01010004000000f0010000030000000000, содержащее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 и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- уникальные метки данного сообщения. Наличие
метки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 убеждает пользователя 1 в том, что только
пользователь 2 мог дешифрировать сообщение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.
4. Пользователь 1, используя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, передает
пользователю 2 сообщение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, содержащее уникальную метку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. Данное сообщение выполняет функцию
подтверждения для пользователя 2, что его респондентом является
пользователь 1.
5. Пользователь 1 генерирует секретный (сеансовый) ключ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, который дважды шифруется с использованием:
своего секретного ключа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и открытого ключа пользователя 2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. После выполнения
процедуры шифрования сообщение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передается пользователю 2. Последний, имея открытый ключ пользователя 1
и свой секретный ключ, дешифрирует полученное сообщение.
В результате перечисленных действия оба пользователя имеют секретный
(сеансовый) ключ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.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2.5 Применение криптосистемы с открытым ключом для аутентификации
пользователя со стороны автономного объекта
На рисунке 2.11 представлена структура телекоммуникационной системы,
состоящая из удаленного объекта и пользователя. Удаленный объект в
автономном режиме выполняет некоторые функции, например, осуществляет
сбор информации J. Через неопределенное время пользователь по каналу
связи передает автономному объекту некоторое сообщение, например команду
K – «Выйти на связь и передать собранную информацию J». Приведенную
систему часто называют системой дистанционного управления объектом.
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В подобных системах возникает задача аутентификации пользователя со
стороны автономного объекта. Действительно, если не принять
соответствующих мер по организации защищенного канала доступа к
автономному объекту, то нарушитель, используя перехват сообщения K,
может несанкционированно управлять автономным объектом.
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ffff030000001e00040000002c010000070000001604ce00b700b800a400040000000201
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2c01000007000000160442002f0128000a01030000001e00040000002c01000003000000
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090200000000050000000102ffffff000400000004010d001c000000fb02ffff00000000
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00000000000000000000040000002d010e0004000000f0010d0009000000320a33002101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2100f000000000000000070011006900b800040000002d010500040000002d0106000400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На рисунке 2.12 приведен сценарий, реализующий надежную аутентификацию
пользователя со стороны автономного объекта, который содержит два этапа
и состоит в выполнении следующих процедур.
1 Этап – предварительная настройка параметров объекта и пользователя.
Данный этап выполняется один раз перед началом автономного
функционирования объекта. Пользователь генерирует и размещает в
оперативной памяти автономного объекта идентификатор ID и временной
параметр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.
2 Этап: – сеанс связи пользователя с объектом:
1. Пользователь по открытому каналу связи посылает автономному объекту
сигнал S, который приводит автономный объект в активное состояние –
выйти на связь с пользователем.
2. Автономный объект генерирует сеансовую, связанную пару ключей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, включает таймер, фиксирует время
начала сеанса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 и передает пользователю свой открытый ключ
picscalex100010009000003d100000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02600280021200000026060f001a00ffffffff000010000000c0ffffff
a2ffffff40020000020200000b00000026060f000c004d61746854797065000050001c00
0000fb0240fe0000000000009001010000000402001054696d6573204e657720526f6d61
6e00be62f577c762f5770100000000003000040000002d01000008000000320afc014700
010000004b791c000000fb0220ff0000000000009001000000cc0402001054696d657320
4e657720526f6d616e00be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320a0901a00101000000ce7908000000320a0802a00101000000
ce790a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000
bc02000000cc0102022253797374656d000000000a000000040000000000000000000100
000000003000040000002d01000004000000f0010100030000000000. Значения
открытого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 и секретного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 ключей имеют
случайный характер.
3. Пользователь генерирует свою сеансовую, связанную пару ключей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, значения которых тоже имеют случайный
характер. Используя открытый ключ объекта, передает ему сообщение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, содержащее общий идентификатор ID и свой
открытый ключ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.
4. Автономный объект, используя свой секретный ключ
picscalex100010009000003d100000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02600280021200000026060f001a00ffffffff000010000000c0ffffff
a2ffffff40020000020200000b00000026060f000c004d61746854797065000050001c00
0000fb0240fe0000000000009001010000000402001054696d6573204e657720526f6d61
6e00be62f577c762f5770100000000003000040000002d01000008000000320afc014700
010000004b791c000000fb0220ff0000000000009001000000cc0402001054696d657320
4e657720526f6d616e00be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320a09019f0101000000d17908000000320a08029f0101000000
ce790a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000
bc02000000cc0102022253797374656d000000000a000000040000000000000000000100
000000003000040000002d01000004000000f0010100030000000000, дешифрирует
принятое сообщение от пользователя
picscalex100010009000003f501000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02a003e00f1200000026060f001a00ffffffff000010000000c0ffffff
a2ffffffa00f0000420300000b00000026060f000c004d617468547970650000d0001c00
0000fb0293fd0901000000009001000000020002001053796d626f6c0077400000005c03
0aa2be62f577c762f5770100000000003000040000002d01000008000000320af501c203
0100000028791c000000fb02a2fd0901000000009001000000020002001053796d626f6c
0077400000002e090a04be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320afe0193080100000028791c000000fb02a2fd090100000000
9001000000020002001053796d626f6c0077400000005c030aa3be62f577c762f5770100
000000003000040000002d01000004000000f001010008000000320afe01db0d01000000
29791c000000fb02bbfd0901000000009001000000020002001053796d626f6c00774000
00002e090a05be62f577c762f5770100000000003000040000002d01010004000000f001
000008000000320aff01290f0100000029791c000000fb0240fe00000000000090010100
00000402001054696d6573204e657720526f6d616e00be62f577c762f577010000000000
3000040000002d01000004000000f001010008000000320a3c02bf0b010000004b790800
0000320a00022a0902000000494408000000320a1702250501000000454408000000320a
3302470001000000444408000000320a9e029e01010000004b4408000000320a2e035906
010000004b441c000000fb0220ff0000000000009001000000cc0402001054696d657320
4e657720526f6d616e00be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320a49011b0d01000000cf4408000000320a4802170d01000000
ce4408000000320abf01f60201000000ce4408000000320ac002f60201000000d1440800
0000320a4f02b10701000000ce4408000000320a4003b10701000000ce441c000000fb02
40fe0000000000009001000000000402001054696d6573204e657720526f6d616e00be62
f577c762f5770100000000003000040000002d01000004000000f001010008000000320a
0002050b010000002c440a00000026060f000a00ffffffff0100000000001c000000fb02
1000070000000000bc02000000cc0102022253797374656d000000000a00000004000000
0000010000000100000000003000040000002d01010004000000f0010000030000000000
. По таймеру фиксирует время принятия сообщения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. Рассчитывает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и принимает решение: если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, то конец связи с
пользователем. В противном случае проверяет: идентификатор ID,
полученный в сообщении от пользователя, совпадает с собственным
идентификатором? Если нет, то конец связи. Иначе – используя открытый
ключ пользователя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, передает ему
сообщение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, содержащее запрос X на
выполнение команды K, и фиксирует время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.
5. Пользователь:
· используя свой секретный ключ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, дешифрирует
принятое сообщение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;
· используя открытый ключ объекта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, передает
удаленному объекту сообщение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, содержащее команду управления K и
новый идентификатор, который будет использован в будущем сеансе связи
(значение нового ID имеет случайный характер);
· фиксирует в своей оперативной памяти значение нового идентификатора;
· уничтожает свою сеансовую пару ключей
picscalex1000100090000036d01000002001c0000000000050000000902000000000500
0000020101000000050000000102ffffff00050000002e0118000000050000000b020000
0000050000000c02a00280061200000026060f001a00ffffffff000010000000c0ffffff
b3ffffff40060000530200000b00000026060f000c004d61746854797065000060001c00
0000fb0236fd0901000000009001000000020002001053796d626f6c0077400000009605
0ac2be62f577c762f5770100000000003000040000002d01000008000000320ade013300
0100000028791c000000fb0236fd0901000000009001000000020002001053796d626f6c
007740000000a6050ad1be62f577c762f5770100000000003000040000002d0101000400
0000f001000008000000320ade01d2050100000029791c000000fb0240fe000000000000
9001010000000402001054696d6573204e657720526f6d616e00be62f577c762f5770100
000000003000040000002d01000004000000f001010008000000320a4d02b60301000000
4b7908000000320a1c02b900010000004b791c000000fb0220ff00000000000090010000
00cc0402001054696d6573204e657720526f6d616e00be62f577c762f577010000000000
3000040000002d01010004000000f001000008000000320af800120501000000cf790800
0000320a59020e0501000000d17908000000320a2901150201000000cf7908000000320a
2802110201000000ce791c000000fb0240fe000000000000900100000000040200105469
6d6573204e657720526f6d616e00be62f577c762f5770100000000003000040000002d01
000004000000f001010008000000320ae001f902010000002c790a00000026060f000a00
ffffffff0100000000001c000000fb021000070000000000bc02000000cc010202225379
7374656d000000000a000000040000000000010000000100000000003000040000002d01
010004000000f0010000030000000000 и открытый сеансовый ключ объекта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.
6. Объект дешифрирует принятое сообщение. Рассчитывает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и принимает решение: если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, то конец связи с
пользователем. В противном случае размещает в оперативной памяти новый
идентификатор ID, уничтожает свою пару ключей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 и выполняет команду K.
Таким образом, каждый сеанс связи пользователя с удаленным объектом
характеризуется использованием «своих» сеансовых ключей и «своего»
сеансового идентификатора. Значения данных параметров имеет случайный
характер, что гарантирует надежную аутентификацию пользователя со
стороны удаленного объекта.
Контрольные вопросы
1. Изобразите модель криптосистемы с одним ключом и поясните принцип ее
работы.
2. Изобразите модель криптосистемы с одним ключом и участием центра
распределения ключей и поясните принцип ее работы.
3. Изобразите модель криптосистемы с открытым ключом, обеспечивающей
конфиденциальность передаваемой информации. Поясните принцип работы
данной модели.
4. Изобразите модель криптосистемы с открытым ключом, обеспечивающей
аутентификацию передаваемой информации. Поясните принцип работы данной
модели.
5. Изобразите модель криптосистемы с открытым ключом, обеспечивающей
конфиденциальность и аутентификацию передаваемой информации. Поясните
принцип работы данной модели.
6. Перечислите основные требования, которым должны удовлетворять
криптосистемы с открытым ключом.
7. Поясните, в чем состоит суть индивидуального публичного объявления
открытых ключей пользователями?
8. Изобразите сценарий распределения открытых ключей с использованием
публично доступного каталога открытых ключей.
9. Изобразите сценарий распределения открытых ключей с участием
авторитетного источника открытых ключей.
10. Поясните, в чем состоит суть сертификации открытых ключей.
11. В чем суть простого распределения секретных ключей?
12. Поясните сценарий распределения секретных ключей с обеспечением
конфиденциальности и аутентичности.
13. Изобразите сценарий применения криптосистемы с открытым ключом для
аутентификации пользователя со стороны автономного объекта
14. Поясните, почему применение криптосистемы с открытым ключом
гарантирует надежную аутентификацию пользователя со стороны автономного
объекта,
3 общие критерии оценки безопасности информационных технологий
3.1 Целевая направленность общих критериев
В РФ нормативными документами по разработке систем защиты информации,
средств вычислительной техники и автоматизированных систем являются
Руководящие документы Гостехкомисси РФ. До недавнего времени Руководящие
документы разрабатывались с учетом международных документов конца 80-х,
начала 90-х годов. В июне 1999 года Международной организацией по
стандартизации (International Organization Standardization, ISO) при
содействии ряда стран был принят стандарт «Критерии оценки безопасности
информационных технологий» [5], [6], [7] (в научной литературе и в
литературе по стандартизации исторически закрепилось название «Общие
критерии» (ОК)).
В 2001 г. под эгидой Гостехкомисси России был подготовлен стандарт ГОСТ
Р ИСО/МЭК 15408-2001 [8], который после соответствующей апробации
вступит в силу с 2004 г.. Данный стандарт является механизмом,
предназначенным для разработки нормативных документов, позволяющих
оценивать средства безопасности информационные технологий (ИТ)
определенного назначения.
Для обеспечения действия данного стандарта ожидается выпуск целого ряда
организационно-методологических документов, определяющих порядок
разработки профилей защиты их оценки, регистрации и применения.
ОК направлены на обеспечение конфиденциальности, целостности и
доступности информации пользователей. ОК дают возможность выработки
системы требований, критериев и показателей для оценки уровня
безопасности информационных технологий.
ОК предназначены для пользователей, разработчиков и специалистов,
обеспечивающих оценку характеристик безопасности систем ИТ.
3.2 Концепция общих критериев
3.3 Профили защиты
Профиль защиты предназначен для сертификации средств защиты информации
продуктов и систем ИТ и получения сопоставимых оценок их безопасности.
Профили защиты служат также основой для разработки разделов требований
безопасности информации (заданий по безопасности) в ТЗ (ТТЗ) на
конкретные изделия ИТ.
3.4 Нормативные документы оценки безопасности информационных технологий
в Российской Федерации
4 защита информации в сетях с технологией ATM
4.1 Обмен информацией между агентами защиты
Установление и поддержание соединений защиты на сетях ATM достаточно
сложный и ответственный процесс, который состоит из двух этапов и
базируется на протоколе обмена сообщениями защиты (Security Message
Exchange, SME) и передаче специальных ячеек защиты OAM (рисунок 1.9).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Протокол обмена сообщениями защиты SME используется для:
· аутентификации агентов между собой;
· согласования служб защиты между агентами защиты;
· установления соединения защиты.
Возможно два варианта реализации протокола SME.
1. В плоскости управления (с использованием канала сигнализации).
2. В плоскости пользователя (с использованием канала данных,
установленного сигнализацией ранее).
В первом случае агенты защиты добавляют к сигнальному сообщению
информационный элемент служб защиты (Security Services Information
Element, SSIE).
Во втором случае протокол SME реализуется через установленное соединение
между пользователями сети ATM. При этом на время действия протокола
обмена сообщениями защиты передача данных пользователей блокируется.
В случае если часть элементов сети не поддерживает протокол SME с
использованием сигнализации, то допускается комбинированное применение
обоих вариантов. То есть, часть сети применяет протокол SME в плоскости
управления (сигнализации), а другая в плоскости пользователей.
Передача ячеек защиты OAM используется только для поддержания соединений
защиты и применяется после завершения протокола SME.
4.1 Защита информации в плоскости пользователя
4.1 Сервисные службы защиты информации плоскости пользователя
Аутентификация плоскости пользователя или аутентификация объекта – эта
служба отвечает за определение идентичности вызывающего и/или
вызываемого пользователей оригиналу. Аутентификация является основной
для установления надежных соединений. Данная служба является базовой для
остальных служб защиты.
Аутентификация может быть как взаимной (симметричной), так и
односторонней (асимметричной). В первом случае оба пользователя
аутентифицируются друг для друга. При односторонней аутентификации
только один пользователь аутентифицируется для другого.
Аутентификация обеспечивается через обмен информацией между агентами
безопасности, которые обмениваются между собой сообщениями безопасности
(Security Message Exchange, SAsme). В свою очередь, обмен сообщениями
безопасности возможен либо в плоскости сигнализации, либо в плоскости
пользователя. Рисунки 3.1 и 3.2, соответственно, показывают уровневые
модели аутентификации основанной на сигнализации и полосовой
(функционирующей непосредственно в полосе данных).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Конфиденциальность плоскости пользователя обеспечивается
криптографическими механизмами, которые защищают данные «пользователя» в
виртуальных каналах и трактах от несанкционированного вскрытия. Данная
служба функционирует на уровне ячеек АТМ. При этом шифруется только
пользовательская часть ячейки ATM.Заголовок ячейки передается
незашифрованным.
Достоверность данных или «оригинальная аутентификация данных» плоскости
пользователя обеспечивается механизмом, который позволяет определять
умышленную модификацию данных. Данная служба функционирует между
пользователями на уровне AAL (для AAL ѕ и AAL 5) и может быть
реализована в двух вариантах:
1) достоверность данных без защиты от повторной модификации;
2) достоверность данных с защитой от повторной модификации.
В первом случае источник перед передачей добавляет криптографическую
характеристику в конце каждой AAL SDU. Эта характеристика вычисляется по
всем AAL SDU. Этот вариант реализации достоверности данных полезен для
протоколов верхнего уровня, которые обеспечивают свою собственную
нумерацию последовательности (например TCP), без добавления заголовка,
требуемого для дублирования данной функции на уровне AAL.
Второй вариант реализации достоверности данных детектирует и
отбраковывает «старые» или «переупорядоченные» AAL-SDU. Это достигается
сначала добавлением номера последовательности в конце каждой AAL-SDU, а
затем вычислением характеристики для совокупности AAL-SDU, включая
номера последовательности. Это характеристика, которая защищает и
AAL-SDU и номер последовательности, затем добавляется к общей AAL-SDU
(которая включает номер последовательности). Этот метод обеспечивает
защиту приложений ATM, которые не осуществляют свою собственную
нумерацию последовательности.
Контроль доступа плоскости пользователя – это применение набора правил
для запроса услуги. Эти правила могут зависеть от атрибутов вызывающего
объекта, таких как идентичность, атрибутов соответствующих параметров,
таких как целевой адрес, системных атрибутов, таких как время и история
предыдущих запросов данным или другими объектами клиента. Правила
контроля доступа могут быть предикатом, сформированным всеми этими
атрибутами. Если предикат удовлетворен, то запрашиваемая служба (услуга)
предоставляется, если предикат не удовлетворен, то запрашиваемая служба
не предоставляется.
Контроль доступа плоскости пользователя требует механизмов для
транспортировки информации контроля доступа, используемой во время
установления соединения, так как механизмы внутри компонентов АТМ
используют эту информацию, чтобы определить нужно ли предоставлять
доступ к соединению. Контроль доступа плоскости пользователя может
основываться на метках защиты (например, стандартные метки защиты [10]),
идентичности источника или получателя, времени дня, типе службы, полях
вышележащего протокола (например, протокол Интернет), или на других
параметрах, которые могут быть определены во время установления
соединения.
Контроль доступа плоскости пользователя обеспечивается на уровне АТМ.
4.2 Службы поддержки
Перечисленные в 3.1 службы защиты информации, которые часто называют
базисом служб защиты. Помимо данного базиса существуют также службы
поддержки, которые необходимы для обеспечения масштабируемости и
повышения эффективности базиса служб защиты (Рисунок 3.1):
· обмен сообщениями защиты и согласование опций защиты
· обмен ключами
· обновление ключей
· инфраструктура сертификации.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0000020101000000040000002d010500050000000902000000021d000000320aea20e403
0c0004007301e420281c0423d0e8f1f3edeeea20332e312082007d00670075007d007500
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b819010004007301e420281c042320006a000500000002010100000016000000320af921
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0d000000320af921b30c010004007301e420281c0423ee00750023000000320af921280d
100004007301e420281c0423f1f2e820efeeebfce7eee2e0f2e5ebff670066007d003a00
7d00750074006a005c0075006e0067006600670074006b000d000000320af921ce130100
04007301e420281c042320006a00040000002701ffff040000002d010000030000000000
Обмен сообщениями защиты и согласование. Для того чтобы предоставить
большинство служб, описанных выше, должны передаваться сообщения между
вовлеченными агентами защиты (SA). Данная спецификация описывает два
метода обмена сообщениями защиты – обмен сообщениями по сигнализации UNI
4.0 и обмен сообщениями in-band (т.е. обмен сообщениями защиты по
уместному виртуальному каналу плоскости пользователя).
Эти методы обмена сообщениями также обеспечивают механизм для
согласования опций защиты. Т.к. требования защиты различные для разных
организаций, важно обеспечить ассортимент служб защиты, алгоритмов и
длительностей ключей, которые соответствуют широкой области потребностей
защиты. Кроме того, законы экспорта и/или импорта некоторых стран
накладывают ограничения, через которые зашифрованные продукты могут
импортироваться/экспортироваться. По этим причинам механизмы защиты АТМ
поддерживают множественные службы защиты, алгоритмы и длительности
ключей. Для того чтобы агент защиты соответствовал общим параметрам
защиты (таким как алгоритмы и длительности ключей), эти методы обмена
сообщениями защиты обеспечивают согласование этих параметров как часть
процедуры установления защиты для VC.
Обмен ключами – это механизм, посредством которого два агента защиты
обмениваются секретными ключами для служб конфиденциальности и/или
достоверности. Для того чтобы противостоять атакам типа «человек в
середине», обмен ключом обычно связан со службой аутентификации. Это
может быть осуществлено путем включения «конфиденциального» ключа внутри
параметров обмена потоков аутентификации.
Также как аутентификация, обмен ключом представлен и для симметричных
(секретный ключ) и для асимметричных (публичный ключ) алгоритмов. Кроме
того, обмен ключом может быть двунаправленным (два пути) и
однонаправленным (один путь).
Обновление ключа сеанса. Ключи сеанса – это ключи, используемые напрямую
для обеспечения служб конфиденциальности и достоверности плоскости
пользователя через виртуальные каналы АТМ. Так как скорость данных может
быть высокой в VC, крайне необходимо периодически менять ключи, чтобы
избежать «повторного использования ключа». Данная спецификация
определяет службу обновления ключа сеанса, которая обеспечивает эту
возможность.
Эта служба представлена в двух фазах – фаза обмена ключом сеанса и фаза
смены ключа сеанса. Фаза обмена ключом сеанса использует «мастер ключ»,
которым обмениваются при установлении соединения (используя службу
обмена ключом), чтобы зашифровать новый ключ сеанса. При приеме
зашифрованного ключа сеанса, приемник расшифровывает ключ сеанса,
используя общий мастер ключ, и сохраняет его для второй фазы – смены
ключа.
Инфраструктура сертификации. В криптосистеме публичного ключа каждая
сторона (агент защиты) Х имеет пару ключей: один – публично известный –
«публичный ключ» Х (РКХ), и другой, известный только Х – «приватный
ключ» Х (SKX). Для того, чтобы сторона А послала секретную информацию
стороне В (или чтобы сторона могла проверить характеристику, переданную
стороной В), А должна получит публичный ключ В, РКВ. Хотя РКВ –
публичный, по определению, никакая сторона Х не должна иметь возможность
заменить РКВ на другой (например РКХ). Чтобы предотвратить такого рода
воздействия, публичным ключом можно обмениваться в форме «сертификата».
Сертификат содержит имя стороны, ее публичный ключ и некоторую
дополнительную информацию и обозначается доверяющей стороной, «орган
сертификации» (СА). Эта характеристика жестко связывает публичный ключ с
предметной стороной. Любая сторона, имеющая доступ к публичному ключу СА
может проверять подлинность сертификата (путем проверки характеристики
СА в сертификате) и использовать публичный ключ, который сертифицирован.
Один раз отмеченные сертификаты могут передаваться через коммутаторы
сообщений не поддерживающие защиту.
4.2 Защита информации плоскости управления
4.2 Сервисные службы защиты информации плоскости управления
Плоскость контроля – это механизм, который позволяет устройствам
конфигурировать сеть, чтобы добиться определенных целей (например,
установить коммутируемый виртуальный канал). Так как сообщение плоскости
контроля могут влиять на состояние и работоспособность сети, их защита
крайне важна.
В данной спецификации защиты определен механизм сигнализации, который
может обеспечить устойчивую криптографическую достоверность данных с
защитой от повторного воспроизведения/переупорядочивания. Этот механизм
позволяет объектам плоскости контроля АТМ проверять источник и
содержимое сигнальных сообщений до того, как этот источник выделяется по
запросу.
Аутентификация и достоверность плоскости контроля – это службы защиты
АТМ, которые увязывают сообщения сигнализации АТМ с его источником.
Путем создания такой увязки, получатель сообщения может конфиденциально
проверить, что сообщение было отправлено именно заявленным источником.
Это обеспечивает механизм, который снижает количество воздействий.
Например, воздействия, направленные на разрыв активного соединения путем
скрытого ввода сообщений RELEASE или DROP PARTY, могут быть
предотвращены, если для канала сигнализации обеспечена аутентификация.
Эта служба также защищает и от умышленной модификации. В данной
спецификации определен механизм аутентификации достоверности плоскости
контроля между соседними объектами сигнализации. Используемый механизм
идентичен механизму, применяемому для достоверности данных с защитой от
повторного воспроизведения/переупорядочивания для плоскости
пользователя.
4.3 Защита информации плоскости менеджмента
4.3 Сервисные службы защиты информации плоскости менеджмента
приложение 1 англо-русский словарь
A
Access control
AuthenticationКонтроль доступа
АутентификацияC
Certification authority
Ciphertext interface
Confidentiality
Cryptographic systemОрган сертификации
Интерфейс зашифрованного текста
Конфиденциальность
Криптографическая системаD
DES
DH
DSA
DSSDigital signature
Data Encryption Standard
Diffie-Hellman
Digital Signature Algorithm
Digital Signature StandardЦифровая подпись
Стандарт шифрования данных
Алгоритм совпадения ключа
Алгоритм цифровой подписи
Стандарт цифровой подписиE
ECB
ECC
ECKAS-DH
ECDSA-like
ESIGNElectronic CodeBook
Elliptic Curve Cryptosystem
Elliptic Curve Key Agreement Scheme – Diffie-Hellman
Elliptic Curve Digital Signature Algorithm
Efficient digital SIGNature schemeЭлектронная книга кодов
Криптосистема с эллиптической характеристикой
Схема совпадения ключей с эллиптической характеристикой Diffie-Hellman
Алгоритм цифровой подписи с эллиптической характеристикой
Эффективная схема цифровой подписиF
FEALFast Data Encipherment AlgorithmАлгоритм быстрого шифрования данныхH
HMAC
H-SHA and H-SHA-1Hashed Message Authentication Code
HMAC using the SHA-1 hash algorithmКэшированный код аутентификации
сообщений
HMAC, использующий кэш-алгоритм SHA -1I
ISOIn-Band Message Exchange
Initiator
Integrity
International Organization StandardizationОбмен сообщениями в полосе
Инициатор
Достоверность
Международная организация по стандартизацииK
Key
Key ExchangeКлюч
Обмен ключомL
LIJLeaf Initiated JoinНаращивание, инициируемое получателем информацииM
MACMessage Authentication CodeКод аутентификации сообщенийN
NIST(U.S.) National Institute of Standards and Technology(США)
Национальный институт стандартов и технологийP
Packet-filtering Router
Plaintext Interface
Private Key
Proxy Server
Public KeyМаршрутизатор фильтрующий пакеты
Интерфейс обычного текста
Приватный ключ
Прокси – сервер
Ключ общего пользованияR
Replay Prevention
ResponderПредотвращение повторного воспроизведения
ОтвечающийS
SA
SAS
SHA-1
SME
SSCOP
SSIE
Security Agent
Security Association
Security Association Section
Secure Hash Algorithm (Revision 1)
Secret Key
Security Message Exchange
Security Negotiation
Service Specific Connection Oriented Protocol
Signaling-Based Message Exchange
Security Services Information ElementАгент защиты
Соединение защиты
Секция защиты связи
Защитный кэш-алгоритм (первая редакция)
Секретный ключ
Обмен сообщением защиты
Согласование защиты
Служебно-ориентированный протокол с установлением соединения
Обмен сообщениями, основанный на сигнализации
Информационный элемент служб защитыСписок сокращений
ВК
ВТ
ИВК
ИВТ
ИТ
МСЭ-Т
ОК
ТПС
УИ
УК
УПВиртуальный Канал
Виртуальный Тракт
Идентификатор Виртуального Канала
Идентификатор Виртуального Тракта
Информационная Технология
сектор по стандартизации Телекоммуникаций Международного Союза
Электросвязи
Общие Критерии
Тракт Передачи Сообщения
Узел-Источник
Узел Коммутации
Узел-Получатель
список литературы
1 Федеральный закон «Об информации, информатизации и защите информации»
принят Государственной Думой 25 января 1995 г. № 24 – ФЗ.
2 ГОСТ Р 50922-96. Защита информации. Основные термины и определения.
3 Новиков С.Н. Методы маршрутизации в цифровых широкополосных сетях
связи: Ч. 1 / Учебное пособие. Новосибирск: 2001. 84 с.: ил.
4 Новиков С.Н. Методы маршрутизации в цифровых широкополосных сетях
связи: Ч. 2 / Учебное пособие. Новосибирск: 2002. 62 с.: ил.
5 Evaluation Criteria for IT Security. Part 1: Introduction and general
model. — ISO/IEC 15408-1: 1999
6 Evaluation Criteria for IT Security. Part 2: Security functional
requirements. — ISO/IEC 15408-2: 1999
7 Evaluation Criteria for IT Security. Part 3: Security assurance
requirements. — ISO/IEC 15408-3: 1999
8 ГОСТ Р ИСО/МЭК 15408-2001. Методы и средства обеспечения безопасности.
Критерии оценки безопасности ИТ (часть1, часть 2, часть3).
9 ATM Security Specification Version 1.0 ATM Forum af-sec-0100.000,
february, 1999.
10 ATM Security Specification Version 2.0 ATM Forum af-sec-0100.002,
february, 2002.
11 Иванов М.А. Криптографические методы защиты информации в компьютерных
системах и сетях. М.: КУДИЦ-ОБРАЗ, 2001 – 368 с.
12 ITU-T Recommendation X.509 «The Directory: Authentication Framework»,
1993.
13 Interim Inter-switch Signaling Protocol (IISP) Specification v1.0
ATM Forum af-pnni-0026.000, december, 1994.
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