End-to-End Encryption: E2EE in Messaging and Files
How E2EE ensures only sender and recipient can read data, the key exchange problem, and how Signal Protocol implements it.
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Tags: security, cryptography, encryption
End-to-End Encryption: How Signal and WhatsApp Protect Messages End-to-end encryption (E2EE) means that messages can only be read by the sender and recipient. Not by the messaging platform, not by the server operator, not by a government serving a legal order to the service provider. The platform routes encrypted bytes it cannot read. This is a significant departure from how most web services work — where the provider can always read your data — and it comes with real design constraints. What E2EE Is (and Is Not) E2EE means: Messages are encrypted on your device before sending Only the recipient's device can decrypt them The server only ever sees encrypted bytes A database breach of the server reveals nothing about message contents E2EE does not mean: Your metadata is private (who you…
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