Production Kit · ISO 9564

PIN block encoder and decoder

Turn a PIN and PAN into an ISO 9564 PIN block, or a PIN block back into the PIN, for formats 0, 1, 2, 3 and 4. Formats 0 to 3 work in clear or with a TDES key; format 4 is always enciphered with AES. Each step is shown: the PIN field, the PAN field, and the clear and enciphered blocks. The decoder checks the control field, PIN length and fill, and tells you when the PAN or key looks wrong.

Test keys onlyEverything runs in your browser and nothing is sent anywhere. Even so, never paste live production keys or real cardholder PINs into a web page: use test keys and test cards.

ISO 0: PIN ⊕ PAN, F-padded (ANSI X9.8).

PIN (4–12 digits)4 digitsPAN13 digitsTDES key (optional, 16 or 24 bytes)

ISO 0 PIN block

PIN field0412 34FF FFFF FFFF

PAN field0000 4012 3456 7890

Clear PIN block0412 74ED CBA9 876FPIN field ⊕ PAN field

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