The Multihoming Idea

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@bencan

I don’t think there’s anything stopping someone building an OTR-style protocol on top of PGP, so I don’t think that’s the limiting factor for plausible deniability. It would be great to see a feature like this added.

You can run OTR on top of anything, but OTR is limited to 1:1 chats between two devices:

Off-the-Record chats

Delta Chat uses OpenPGP for encryption, which does not support forward secrecy. Apart from backwards compatibility, the greatest obstacle to adding forward secrecy is multidevice support. Double Ratchet protocols (Signal protocol, XMPP OMEMO, Olm, Megolm) do not advance the ratchet on devices which are not participating in the chat, which could be a problem if one of the devices is offline for a long time. Since different devices use different keys, the protocol also depends on the server publi…