this post was submitted on 15 Aug 2023
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Explain Like I'm Five

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How is the Recipient the Only One Able to Decrypt End to End Encryption? (sopuli.xyz)
submitted 1 year ago by [email protected] to c/explainlikeimfive
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I understand that in end to end encryption the message is encrypted and only the recipient has the key to Decrypt it. How is the key transmitted, and how can the key not get intercepted with the message?

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[–] [email protected] 8 points 1 year ago

The private key never leaves the one it belongs to - if it does, then the encryption isn‘t secure anymore. If keys are sent, then the public ones, which are ‚public‘ (e.g. let me send you my public key, so you can send encrypted messages to me).

When you create a key pair, you get which the private and which the public one is. Keep your private key, private and you‘re the only holdener.

For advanced security, the messages (e.g. E-Mails) are secured on top with TLS, which encrypts the message on its way. If there‘s a man-in-the-middle attack, he would just see the encrypted message with no key to decrypt it.