this post was submitted on 08 Nov 2023
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The Signal messenger and protocol.

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Signal tests usernames that keep your phone number private (www.bleepingcomputer.com)
submitted 1 year ago by celmit@lemmy.ca to c/signal@lemmy.ml
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[–] pabloscloud@lemmy.world 3 points 1 year ago

They do that for easier discovery of existing contacts. Say someone switches from WA to Signal and they want to contact someone. How'd they know their username? Their contact list would be empty and they would uninstall it. Signal would only be for nerds.