this post was submitted on 22 Jun 2025
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Does it not give away your identity when you join a Signal group?
Signal defaults to hiding your phone number since the release of user names: https://signal.org/blog/phone-number-privacy-usernames/
But they must still have your phone number and associate it with your username. So it would still be easy for a government organization to force Signal to give up the identities of all people who join a group.
They can't get your username from your phone number (but they can b'get your phone number from your username)