What is end-to-end encryption
The message is encrypted by the sender and decrypted by the receiver. No one in between, including service providers, can see the plaintext.
Difference from regular HTTPS
HTTPS: Client to server encryption, visible to the server. End to end: Only the sender and receiver can see it, the server only sees the ciphertext.
Representative application
Signal: The safest messenger. WhatsApp: using the Signal protocol. Telegram: It is not enabled by default and needs to be manually enabled.
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