It compares this to a known, non-sensitive KCV stored in the database.
The 32-digit length corresponds to the AES-128 block size. AES is the current industry standard for encrypting Card Verification Values (CVV/CVC) and Track 2 data. enter the 32 hex digits cvv encryption key-mdk-
(0–9, A–F), which represent a 128-bit (16-byte) double-length Triple DES (3DES) key. It compares this to a known, non-sensitive KCV
