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MMLU / Suppose that Alice and Bob sent confidential text messages to one another last…

Problem

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question

Suppose that Alice and Bob sent confidential text messages to one another last month through an encrypted messaging system. Alice and Bob are worried that an adversary might compromise one of their computers today, while they are taking the 6.858 final exam, and would then be able to decrypt those messages. Which of the following security properties can address Alice and Bob’s concern?

choices

  1. Authentication.
  2. Deniability.
  3. Forward secrecy
  4. Backward secrecy.

subject

computer_security

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