@Sturmflut @fabiscafe @vkc
Or to put it more on the nose: You can be certain that i.e. @Mer__edith of @signalapp will talk cuz she can't pull the 5th on behalf of a user and won't go to jail for any of them.
Whereas if i.e. @monocles (or any #XMPP provider) got sent an order (and just like #Signal they'd comply if done so duely through legal channels, which is way harder in #Germany than the #USA cuz #GDPR & #BDSG & #LawfulInterception being way stricter than #CloudAct), if users used #OMEMO or #PGP/MIME, they (or any other provider) literally can't decrypt even when held at gunpoint, because asymetric public-private cryptography was literally designed to not be breakable unless someone managed to MITM comms from the first contact and any verification.
- Which is unlikely to impossible unless one's able to literally isolate and manipulate all comms and means to communicate of at least one party, at which point they'd already have warrants to search everything and don't even bother to try MITMing comms but instead kick in doors.
But that's a totally different subject of #OpSec & #InfoSec, not #ComSec & #ITsec on it's own...