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Comment on Using Signal groups for activism

namingthingsiseasy@programming.dev ⁨2⁩ ⁨months⁩ ago

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.

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ouch@lemmy.world ⁨2⁩ ⁨months⁩ ago
Wrong. Signal servers don’t know of group members.

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- namingthingsiseasy@programming.dev ⁨2⁩ ⁨months⁩ ago
  Really? That’s interesting. But the group membership list must be persisted somewhere, no? Otherwise, you wouldn’t know where to send and receive messages. So where is it persisted then?
  
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  - ouch@lemmy.world ⁨2⁩ ⁨months⁩ ago
    signal.org/blog/signal-private-group-system/
    
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teolan@lemmy.world ⁨2⁩ ⁨months⁩ ago
They can’t get your username from your phone number (but they can b’get your phone number from your username)

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