Cryptographic algorithms and processes

CCA algorithms and processes include key verification algorithms, data-encryption processes, as well as key format and encryption processes.

Cryptographic key-verification techniques
The key-verification implementations described in this document employ several mechanisms for assuring the integrity and value of the key.
Modification Detection Code calculation
The Modification Detection Code (MDC) calculation method defines a one-way cryptographic function.
Ciphering methods
The Data Encryption Standard (DES) algorithm defines operations on 8-byte data strings.
MAC calculation methods
Four variations of DES-based message authentication can be used by the MAC Generate and MAC Verify verbs.
RSA key-pair generation
RSA key-pair generation is determined based on user input of the modulus bit length, public exponent, and key type.
Multiple decipherment and encipherment
CCA uses multiple encipherment and decipherment to protect and retrieve cryptographic keys and PIN data.
PKA92 key format and encryption process
The Symmetric Key Generate and the Symmetric Key Import verbs optionally support a PKA92 method of encrypting a DES key with an RSA public key.
Formatting hashes and keys in public-key cryptography
The Digital Signature Generate and Digital Signature Verify verbs support several methods for formatting a hash and, in some cases, a descriptor for the hashing method, into a bit-string to be processed by the cryptographic algorithm.
Derived unique key per transaction calculation method
This section describes the calculation method for deriving the derived unique key per transaction (DUKPT) key according to ANS X9.24 and performing the special encryption and special decryption processes.

Parent topic: Reference information