IBM Computer Hardware 2 User Manual download pdf (Page 471)

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CCA Release 2.54

ISO-1 PIN-Block Format

The ISO-1 PIN-block format is equivalent to an ECI-4 PIN-block format. The ISO-1

PIN-block format supports a PIN from 4 to 12 digits in length. A PIN that is longer

than 12 digits is truncated on the right.

The following is the ISO-1 PIN-block format:

1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16

┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐

│ 1 │ L │ P │ P │ P │ P │P/R│P/R│P/R│P/R│P/R│P/R│P/R│P/R│ R │ R │

└───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┘

Figure E-4. ISO-1 PIN-Block Format

where:

1 Is the value X'1'.

L Is the length of the PIN, which is a 4-bit value from X'4' to X'C'.

P Is the PIN digit, which is a 4-bit value from X'0' to X'9'. The values

of the PIN digits are independent.

R Is a random digit, which is a value from X'0' to X'F'. Typically, this

should be used for predetermined transaction unique data such as a

sequence number.

P/R Is a PIN digit or a random digit, depending on the value of PIN length

L. The number of random digits is in the range from 2 to 10, and the

random digits can be different.

Example:

L=6, PIN = 123456, L = X'6'.

PIN block = X'161234566ABCFDE1', where X'6', X'A', X'B', X'C', X'F',

X'D', X'E', and X'1' are the random fillers.

Appendix E. Financial System Verbs Calculation Methods and Data Formats E-11

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