by EFTlab is a widely used, free-to-use suite of applications designed for payment industry professionals. The Cryptographic Calculator
: If you just need a cryptographic calculator for tasks like hash generation, cipher encoding/decoding, or HMAC, I highly recommend CyberChef (by GCHQ). It's free, no install needed, and works offline if saved as a local HTML file.
: Functionality to encode and decode Thales key sets, including Local Master Keys (LMK). Payment Keys
Security tips:
The Cryptographic Calculator organizes its vast functionality into several logical menus: