XEP-0384: OMEMO version 0.4 #903
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Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>
Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>
Sessions are device-to-device relationships. When we talk about 'opting-out' we want to communicate a _preference_ for an entire account not just on specific device-to-device relationship. The actual double ratchet sessions will also remain intact. So it is not reversing what ever we did in 'Starting a session' but just switching back from omemo to plain. (When we currently do that manuelly we also wouldn’t touch the actual underlying sessions) I would like to note at this point that we don’t have a way of 'opting-in' either. Nowhere do we say that a client MUST use OMEMO if they discover that the other side has bundles. Therefor I find it strange that the opt-out was a MUST and i weakend it to SHOULD. (we don’t say that a client SHOULD start omemo when it discovers support either so I even find a SHOULD too strong)
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As promised three years ago we got together and created a new 'libsignal-free' iteration of the OMEMO specification. This new iteration is the result of almost five years of implementation experience. It is the combined work of Andreas Straub, Daniel Gultsch, Tim Henkes, Klaus Herberth, Paul Schaub and Marvin Wißfeld.
Find a rendered version here: https://gultsch.de/files/xep-0384.html
Note to editor: Feel free to squash this into one commit.
Regarding authorship see Council Minutes from 2020-01-22.