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>In Signal's design nobody ends up knowing this except the sender and recipient. I’d like to see an explanation for that, it sounds magical.
by swiley 6y ago
>In Signal's design nobody ends up knowing this except the sender and recipient.
I’d like to see an explanation for that, it sounds magical.
- deleted 6y ago[deleted]
- tialaramex 6y agoSignal can't avoid learning who a message is for (the recipient) in order to deliver it but they can easily avoid learning the sender by not asking. The recipient will learn the sender by decrypting the message, in which the sender proved who they actually are. The remaining problem for Signal was enabling this without spam. To do that recipients choose whether to tell everybody, or nobody or just people they know (the default) a key. Proving knowledge of this key is enough to send messages to that recipient. If you get messages you don't want, just block that sender, your key is rotated and they won't know the new key. https://signal.org/blog/sealed-sender/ https://signal.org/blog/sealed-sender/