Sun Oracle Crypto Accelerator 6000 Board, Руководство пользователя

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Chapter 5 Developing and Administering Financial Services 135
ISO Format 1
ISO Format 1 is the supported ISO-1 PIN block. This format supports a PIN length
between 4 and 12 digits. PINs longer than 12 digits are truncated.
The ISO-1 PIN-block format, represented in hexadecimal characters, appears as
follows:
The ISO-1 PIN-block format hexadecimal characters are defined in
TABLE 5-21
.
PIN Calculation Methods
The Sun Crypto Accelerator 6000 board supports the Visa PIN Validation Value
(PVV) and the IBM-3624 methods for calculating PINs.
Visa PVV Method
PVV is a calculation and verification method specified by Visa. The credit card issuer
or a designated agent provides a PIN verification service (PVS). This service
compares the cardholder's PIN to a cryptographic transformation of the PIN.
The PVV method is a two-step process:
1. When a PIN-related credit card is issued, the issuer derives a 4-digit PVV. The
PVV and the PIN verification key index (PVKI) are either encoded on the credit
card or registered in an online database. The stored PVV is called the reference
PVV.
1 L P P P P P/R P/R P/R P/R P/R P/R P/R P/R R R
TABLE 5-21
ISO Format 1 Hexadecimal Characters
Field Name Value
1 Fixed data 4-bit binary value of 0x1
L PIN length 4-bit binary value between 0x4 and 0xc
P PIN digit 4-bit binary value between 0x0 and 0x9
R Random Digit 4-bit binary value between 0x0 and 0xf
P/R PIN digit or
random digit 4-bit binary value determined by the PIN length – P or R