PyNaCl is a Python binding to libsodium, which is a fork of the Networking and Cryptography library. These libraries have a stated goal of improving usability, security and speed. It supports Python 2.7 and 3.4+ as well as PyPy 2.6+.

• Digital signatures
• Secret-key encryption
• Public-key encryption
• Hashing and message authentication
• Password based key derivation and password hashing