WhatsApp introduced end-to-end encryption to its messaging service last year in tandem with policies adopted by its parent company Facebook. End-to-End encryption on WhatsApp works by creating two security keys, one private key and another public key. When a message is sent, the private key stays on the sender’s phone. Another public key accompanies the sent message and encrypts it even before the message reaches WhatsApp’s servers. Once the server transmits the message to the receiver, the private key of that user unlocks the sent message.
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