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Joined 6 months ago
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Cake day: February 6th, 2025

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  • sure!

    during or after a conversation, anyone with the keys can create fake transcripts by creating messages with the same metadata, same nonce, different content.

    because of this, no transcript can be proven to be the correct transcript. the trade-off is you don’t get forward secrecy on the per-message level, but you get it per-conversation.

    another detail is that there is no identity, so all the above aside, there’s also no way to prove who sent which message.






  • interesting point! i chose symmetric shared key because it means you can’t prove who sent what message.

    the shared secret does add some authentication, which i think is necessary. the goal is it only creates enough to be practical (a random person can’t eavesdrop), but not enough to prove things. messages themselves still aren’t authenticated by any one person.