Arqc-gen.exe

While versions vary (different developers compile their own builds), the standard syntax usually follows this pattern:

arqc-gen.exe [options] <input_data>

Typical Arguments:

arqc-gen.exe is a command-line utility designed to generate ARQC (Authorization Request Cryptogram). In the EMV payment standard, an ARQC is a dynamic cryptographic value generated by a payment card (or a secure element within a smartphone) during a transaction. It proves to the issuing bank that the card is physically present and authentic. arqc-gen.exe

The _gen suffix indicates "generator." This tool artificially creates these cryptograms offline. It is typically found in:

For more complex operations or specific configurations (like generating parameters for certain curves): While versions vary (different developers compile their own

When executed, arqc-gen.exe outputs a 16-byte (or 8-byte, depending on algorithm) hexadecimal cryptogram. For example:

ARQC: 7A3F 92C1 5D0E 8B4F 6A2C 18E9 3D07 F1B4

This string is what the terminal forwards to the acquiring bank during online authorization. Typical Arguments: arqc-gen

Important: Modern EMV (with DDA/CDA) and tokenization make simple ARQC generation insufficient for fraud. Issuers also check ATC monotonicity. Generating an ARQC with arqc-gen.exe does not equal having a working cloned card.