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Що з наступного НАЙКРАЩЕ описує безпеку, яку пропонує протокол обміну

ключами Діффі-Хеллмана (якщо припустити, що проблема DDH є важкою)?

An attacker eavesdropping on an execution of the protocol does not know whether the parties have shared a key or not.

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An attacker eavesdropping on an execution of the protocol cannot compute the key shared by the parties.

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An attacker is unable to impersonate either party taking part in the protocol.

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An attacker eavesdropping on an execution of the protocol cannot distinguish the key shared by the parties from a uniform key.

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