Calculate Cryptogram ARQC/ARPC

Terminal + ICC data from ISO8583 DE55, then master key / PAN for session key derivation.

9F02 amount authorised 9F03 amount other 9F1A terminal country code 95 tvr 5F2A currency code 9A transaction date 9C transaction type 9F37 unpredictable number 82 aip 9F36 atc 9F10 iad

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master_key.hex pan psn iv.hex padding.hex 9F26 application cryptogram

  How it works

Cryptogram calculation

Terminal data

• Amount Authorised / Amount Other
• Terminal Country Code / TVR / Currency Code
• Transaction Date / Type / Unpredictable Number

ICC data

• Application Interchange Profile (AIP)
• Application Transaction Counter (ATC)
• Issuer Application Data (IAD)

  Calculation dump terminal_data

icc_data

dol_data