EC-Council Certified Ethical Hacker (CEH V13)

What is 'key exchange' in cryptography and which protocol is most commonly used?

Distributing symmetric keys via email; PGP Securely establishing a shared secret over an untrusted channel; Diffie-Hellman Storing encryption keys in a hardware module; HSM Sharing public keys via certificates; X.509

Correct Answer:

Securely establishing a shared secret over an untrusted channel; Diffie-Hellman

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