Security
Diffie-Hellman
shared secret over a public channel
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Cryptography FoundationsSecurityMore terms from this board
- AES-GCMauthenticated encryption (confidentiality + integrity)
- asymmetric / public-keya key pair (RSA/ECC, slow, key exchange)
- certificatea public key signed by a CA
- cryptographic hashone-way fixed digest (SHA-256; deterministic, collision-resistant, avalanche)
- digestthe hash output
- digital signaturesign(private) / verify(public) → authenticity + non-repudiation
- ECB penguinwhy block mode matters
- forward secrecypast traffic stays safe if a key leaks
- HMAChash + secret key (integrity + authenticity)
- key distributionthe problem asymmetric solves
- KMS/HSMkey storage
- noncea number used once
- RSA / ECCasymmetric algorithms
- symmetric encryptionone shared key (AES, fast, bulk)