Payment cryptography workflow library. EMV, DUKPT, PIN blocks, MAC, card validation, TR-31/TR-34, and HSM command inspection. Inspectable recipes for development, testing, and interoperability.

This fork extends CyberChef with a focused set of payment cryptography operations intended for engineering, debugging, and interoperability work in regulated payment environments.

MCP server for AWS Payment Cryptography — key lifecycle, HSM migration analysis, and PCI-aware cryptographic operations. Works with Claude Code, Codex CLI, and any MCP-compatible client.

Rust TCP proxy: translate Thales payShield 10K and Futurex Excrypt wire commands to AWS Payment Cryptography API calls, without changing the application.