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magikarp, you're hellbanned. Apparently after your last comment about HN censorship, so... a little irony there I guess.

I went through this while experimenting with cryptocat, it's confusing as hell. the group fingerprint is your fingerprint, in that chatroom, for that session.

I peeked at some of the issues on Github and it looks like they're adding challenge-response for OTP verification so you can have a way to prove identity without an active out of band channel.

Fingerprints are for verifying your own identity in the group chat context. They confirm your own identity to others.

It's hard for new users to understand this — the blog post mentions that Cryptocat is trying to make cryptographic authentication less confusing.

I joined, but the fingerprint is different... :/

A unique fingerprint is issued to each individual.

b here, well worth a look, buddies list seems to be crashy, but very well designed with minimal features. worth checking out.