The executable arqc-gen.exe is a specialized utility used by payment system developers and security researchers to simulate the EMV chip card authorization process . Its primary purpose is to generate an Authorization Request Cryptogram (ARQC)
If you found arqc-gen.exe somewhere, be cautious – it could be a legitimate internal banking tool, but also malware sometimes uses similar names to hide. Always scan executables from unknown sources.
Key Diversification: You start with a Master Derivative Key (MDK) and "diversify" it using the card’s PAN to get a Unique Derivation Key (UDK). arqc-gen.exe
, which is the digital signature a chip card sends to a bank to prove it is genuine. Key Feature: Cryptogram Simulation A helpful feature of this tool is its ability to manually calculate ARQCs
: Verifying that a generated ARQC matches the expected output based on specific input data (like amount, terminal unpredictable number, and transaction counter). Security Research The executable arqc-gen
Verify Master Key Derivation: Validating the process where a unique card key is derived from a bank's master key.
If you find this file in unexpected places (e.g., C:\Windows\Temp, attached to an email, or on a POS terminal’s root directory), treat it as a high-confidence indicator of compromise. Key Diversification : You start with a Master
In essence:
