Editing Deniable encryption (section)

==Deniable authentication==
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Some in-transit encrypted messaging suites, such as [[Off-the-Record Messaging]], offer [[deniable authentication]] which gives the participants [[plausible deniability]] of their conversations. While deniable authentication is not technically "deniable encryption" in that the encryption of the messages is not denied, its deniability refers to the inability of an adversary to prove that the participants had a conversation or said anything in particular.

This is achieved by the fact that all information necessary to forge messages is appended to the encrypted messages &ndash; if an adversary is able to create digitally authentic messages in a conversation (see [[hash-based message authentication code]] (HMAC)), they are also able to [[forgery|forge]] messages in the conversation. This is used in conjunction with [[perfect forward secrecy]] to assure that the compromise of encryption keys of individual messages does not compromise additional conversations or messages.