Tag: X3DH

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How WhatsApp Encrypts Your Messages So Not Even WhatsApp Can Read Them

WhatsApp encrypts every message with Signal's X3DH handshake and Double Ratchet algorithm, so even WhatsApp's own servers never see plaintext. Here's how identity keys, pre-keys, per-message ratcheting, and Sender Keys work together to secure 1:1 chats, groups, and attachments end-to-end

Jul 22, 202620 min readRead →