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This is excellent! We need more work like this that is standardized and stable.

From the protocol end, I heard good things about noise [1] but I haven't seen acual apps make use of it(Edit: It literaly says "Noise is currently used by WhatsApp, WireGuard, Lightning, and I2P." On their page). I highly encourage the author of saltpack to keep a reference list of projects that make use of saltpack.

[1] http://noiseprotocol.org/

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Noise is a bit different in that it's mostly for creating DH protocols with a reduced chance of shooting oneself in the foot. Saltpack seems like it's a wrapper for AEAD encryption w/nacl's secretboxes that also does serialization via messagepack? I'm not sure I see the point of a "crypto messaging format" that pastes nacl and messagepack together and calls it a standard.

I think they're similar in that as you pointer out they reduce the chance of you shooting yourself in the foot. Perhaps a project using noise for data-in-motion and saltpack for data-at-rest(and before transmission) would involve less foot shooting?

I haven't seen any references of Saltpack being used by anybody yet.

don't know about references but in the footer of the website it says "Saltpack's been in active development by Keybase and collaborators since 2017."

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