OMEMO, OTR and GPG suppprt

The XMPP foundation has begun standardizing the OMEMO end-to-end encryption protocol. Therefore, I decided it would be a good time to include support for this interesting new protocol on the xmpp.dk server.

In practice, this means I have installed a new plugin, mod_e2e_policy, which enables support for the three major e2e encryption standards on XMPP nowadays, namely OTR (which you already know quite well), OMEMO and OpenPGP/GPG.

OMEMO provides several advantages over OTR. Among other things, it supports offline messages, group chats (which means I can also start looking into enabling MUC conferences on the server at some point) and also it does away with user-based fingerprints and instead uses device-based keys. This is especially useful if you’re connected on multiple devices simultaneously. As you know, this was problematic with OTR, but with OMEMO you can get end-to-end encryption on all of your devices and hopefully never lose a message.

As always, if you have any trouble or want to ask questions, you can always contact me directly over Jabber or you can reach out on our Twitter.

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