Signal >> Specifications >> The PQXDH Key Agreement Protocol

narwhal@lemmy.ml to Technology@lemmy.ml – 51 points –
Signal Messenger: Speak Freely
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The sidebar says the post was submitted on September 9, but under the title it says an hour ago. How can this be?

PQXDH is designed for asynchronous settings where one user (β€œBob”) is offline but has published some information to a server. Another user (β€œAlice”) wants to use that information to send encrypted data to Bob, and also establish a shared secret key for future communication.