E2E in chat (was: Re: S/Mime usage)

Patrick Cloke patrick at cloke.us
Wed Oct 9 19:58:16 UTC 2019

On 10/9/19 2:10 PM, Wiktor Kwapisiewicz wrote:

> Hi Kai,
> On 09.10.2019 17:13, Kai Engert wrote:
>> FYI, it already is. We support XMPP/Jabber and some others, and we're
>> also close to shipping OTR, but we aren't yet ready to announce it.
>> Hopefully in a few weeks we'll do a call for testing.
> Is there a rationale somewhere why OTR was selected? (for example
> multiprotocol support?)
> As far as I know OTR has been largely replaced by OMEMO in XMPP/Jabber.
> Source:
> https://wiki.xmpp.org/web/XMPP_E2E_Security#OTR_.28Off-the-record_Messaging.29
> (see also comments about OMEMO on that page).
Hey Wiktor,

OTR is cross protocol, which fits nicely into what Thunderbird supports.

It is unfortunately hard to get a clear picture of what is worth
implementing for XMPP (i.e. how many users exist that support different
end-to-end encryption technologies). The major downside, in my
understanding, is that OTR does not support multi-user chats. I'm sure
there are some others, but OTR seemed like a good place to start.

There's a bug [1] about implementing OMEMO for anyone who is interested!


[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1237416

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