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Authentication (cryptography)

Ciro Santilli (@cirosantilli, 37) ... Area of technology Information technology Computer Computer science Cryptography Man-in-the-middle attack
Updated 2025-07-16  0 By others on same topic  0 Discussions Create my own version
In the context of cryptography, authentication means "ensuring that the message you got comes from who you think it did".
Authentication is how we prevent the man-in-the-middle attack.
Authentication is one of the hardest parts of cryptography, because the only truly secure way to do it is by driving to the other party yourself to establish a pre-shared key so you can do message authentication code. Or to share your public key with them if you are satisfied with the safety of post-quantum cryptography.

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