GitHub - revery-project/revery: 💭 Conversations that never happened.
github.comi started a (very niche) private messaging protocol & little CLI app demo. i’m no security expert, so any feedback or questions would be appreciated.
the gist is an ephemeral message exchange without identities. the goal is ultimate deniability.
the interesting (and weird) part is that messages are encrypted but not authenticated. this means an imposter could show up if they know the shared secret. otoh this means you can deny anything you say.
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Can you elaborate on what this means?
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.