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Nov
19
comment How does a chosen ciphertext attack work, with a simple example?
The important fact is that the attacker somehow learns what his test message decrypts to. It doesn't need to be anything as "obviously risky" as calling on an unsecured line -- in a more modern setting, we could be thinking of a protocol where an encrypted message contains a nonce that the recipient will later echo back without encryption, or of a setting where the encrypted message contains data that the recipient is supposed to publish on behalf of the sender.
Nov
19
awarded  Teacher
Nov
18
answered How does a chosen ciphertext attack work, with a simple example?