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Wire uses MLS [1], it has nothing to do with the Signal protocol.

afaik Wire works on MLS like many others do - but according to Wikipedia Wire uses the Signal Protocol. Your "source" does not back up your claim

I just read the Wikipedia page and it says, emphasis mine:

> Wire's instant messages are encrypted with Proteus, a protocol that Wire Swiss developed based on the Signal Protocol.

That doesn't sound like "Wire uses the Signal Protocol" to me.