[Standards] Proposed XMPP Extension: Ephemeral Messages

Dave Cridland dave at cridland.net
Mon Dec 30 16:56:30 UTC 2019


That specification isn't linked from XEP-0384 at all, so how are we
supposed to be able to tell it affects OMEMO?

On Sat, 28 Dec 2019 at 17:30, Paul Schaub <vanitasvitae at fsfe.org> wrote:

> That is true.
> The related part of the double ratchet spec is
> https://signal.org/docs/specifications/doubleratchet/#out-of-order-messages
>
> Paul
>
> 28.12.2019 18:11:18 Philipp Hörist <philipp at hoerist.com>:
>
> Hi,
>
> > 4.5 Exchanging Ephemeral OMEMO Messages
> > OMEMO requires that messages are delivered in a sequence. If a message
> is missing, all the following messages cannot be decrypted and a new
> session has to be established.
>
> This is wrong, OMEMO can well deal with missing messages, this and all
> subsequent points that build on that assumption should be removed from the
> XEP
>
> Regards
> Philipp
>
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