psec package provides tools for protecting sensitive data and cardholder authentication in retail payment transactions.

psec is published on PyPI and can be installed from there:

pip install psec

• tr31 - TR-31 key block wrapping and unwrapping
• cvv - Card Verification Value generation
• des - Triple DES utilities (a wrapper over cryptography)
• aes - AES utilities (a wrapper over cryptography)
• mac - Message Authentication Code generation
• pin - Personal Identification Number generation
• pinblock - PIN Blocks encoding and decoding