Crypto · PIN blocks
PIN Block Calculator
Encode or decode ISO 9564 PIN blocks. Formats 0 and 3 XOR with the PAN; formats 1 and 2 are PIN-only. Optionally encrypt or decrypt under a TDES PEK/ZPK (ECB, no padding).
Operation
Format
4 to 12 decimal digits
Formats 1 and 3 use random padding when left blank
Clear PIN block (16 hex)
Required for formats 0 and 3 — includes check digit
Optional — leave blank for clear PIN block only