Require Perfect Forward Secrecy for Real-Time Communications

[jonah (Jonah Aragon)]

This was previously discussed and resolved in Feb 2023:

IM/RTC: Perfect Forward Secrecy Requirement

We’re currently considering a change to our instant messenger criteria which would require all messengers to support Perfect Forward Secrecy. This would disqualify Session of course, which notoriously removed support for PFS in a crypto change despite initially supporting it while their product was based on Signal’s crypto. Generally speaking, the team is okay with this change. This would also disqualify Matrix. While Megolm theoretically supports PFS, it is not mandatory and in fact is not us…

I’m going to mark as rejected because this new discussion doesn’t reference or address any of the previous points in the discussion linked above.

If you read through and want to counter any specific points there then we can revisit it here. I just think the final decision we made at the time was a pretty well-reasoned one.