Submitted by celebratedrecluse in freeAsInFreedom
Signal Group Calls are one of many features that we have designed with [Signal Private Groups](https://signal.org/blog/signal-private-group-system/) as a foundation, using our [RingRTC](https://github.com/signalapp/ringrtc) library for handling frame encryption
quandyalaterreux wrote
Reply to comment by celebratedrecluse in Signal, Tor, and the USA by celebratedrecluse
graph, conversation list, location, user avatar, user profile name, group memberships, group titles, or group avatars.** https://signal.org/blog/sealed-sender/ (see https://signal.org/blog/private-contact-discovery/ for the technology and https://signal.org/bigbrother as a case in point