The MDK acts as the "parent" key. It is stored securely in a Hardware Security Module (HSM) and is never exposed in plain text during a transaction. How the MDK Functions in Payment Systems
: A standard cardholder never has access to this 32-digit hex key. It is a high-level security credential owned only by the bank or card issuer. enter the 32 hex digits cvv encryption key-mdk-
The feature would appear in software for: The MDK acts as the "parent" key
Subject: Unsecured Reference to MDK & 32-Hex-Digit CVV Encryption enter the 32 hex digits cvv encryption key-mdk-