Yes, I know about Keychat. It still needs to mature some - the deb package is likely for trixie and doesn't work on my Whonix workstation, and the AppImage flickers a lot but at least seems to work. I...
Currently, Signal’s group chats primarily use the Sender Key scheme, rather than the previous pairwise-group approach.
The post compromise security of the Sender Keys group is not as strong as that of MLS groups.
The post compromise security of the Sender Keys group is not as strong as that of MLS groups.