A cryptographic algorithm (also called a encryption algorithm) is a
|“||mathematical algorithm, used in conjunction with a secret key, that transforms original input into a form that is unintelligible without special knowledge of the secret information and the algorithm. Such algorithms are also the basis for digital signatures and key exchange.||”|
|“||[a] well-defined computational procedure that takes variable inputs, often including a cryptographic key, and produces an output.||”|
Cryptographic algorithms specify the operations of encrypting, decrypting, authenticating, digitally signing, and verifying digital signatures or authentication codes. Algorithms are defined in a cryptographic system and a supporting CKM system for data protection, key protection, key generation, key establishment (exchange, agreement, distribution), key update, key destruction, etc.