Hello. We have OpenPGP/MIME to sign and encrypt e-mail, thus securing the communication. It is my understanding that the other party can publish the signature and the unencrypted message and thus prove that somebody in the possession of the private key wrote (or at least signed) the message.
One way to do deniable authentication is to take a shared secret.and use that as the key to a MAC function. However, this does not seem to be implemented in OpenPGP, although it could be done as an additional layer. Is there any existing, convenient way to do deniable authentication for e-mail? Thanks. -- Do not eat animals, respect them as you respect people. https://duckduckgo.com/?q=how+to+(become+OR+eat)+vegan
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