Google has implemented their own E2EE on top of RCS (based on Signal’s messaging for one to one conversations, based on MLS for group chats), but they haven’t published any specifications for that.
Ahh, this must be what I was thinking of, then. Thanks for clarifying!
deleted by creator
Ahh, this must be what I was thinking of, then. Thanks for clarifying!
https://support.google.com/messages/answer/10262381?hl=en
E2EE White paper (technical specifications) is listed on this site (pdf)
deleted by creator
Thanks for this explanation!