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by StavrosK
3218 days ago
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No, the server just says "I know these email addresses starting with 'foo': foo@example.com, foo2@gmail.com, foo3@hotmail.com". If your friend's email address is in there, you know they have Signal. The hashing is so people can't easily get a list of all the phone numbers, which is easy to work around, but, then again, they could just hammer the endpoint querying for all the various numbers anyway. |
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