Both free, browser-first, built for engineers validating payment cryptography against the standards.
The cryptographic toolkit.
Every operation you need to validate payment crypto — encryption, key blocks, EMV, PIN, parsers — running in your browser on synthetic test data.
Thales payShield, in the browser.
Practice HSM commands without hardware. A faithful Thales payShield 10K console — host commands, key management, PIN translation — with zero cost and zero install.