I agree that decentralization and federation is an important step for security and privacy, reducing the dependence on a signal entity. That said, based on OWS

I agree that decentralization and federation is an important step for security and privacy, reducing the dependence on a signal entity. That said, based on OWS' writeup on the subpoena they received[1], the only user metadata they collect are the user's phone number(or a hash of it? for identification), that user's last connection date, and the dat etheir account was created. [1] https://whispersystems.org/bigbrother/eastern-virginia-grand-jury/ https://whispersystems.org/bigbrother/eastern-virginia-grand...