PIN Verification

The HSM supports four methods of PIN verification:

IBM 3624.

Diebold Proprietary Algorithm.

VISA PVV.

PIN comparison.

For each type, the PIN block is encrypted under a TPK or a ZPK depending on whether it has come from a local ATM (or PIN pad etc.) or from an acquirer. Therefore support is provided for verifying a PIN from a “terminal” or from “interchange”.