PyNaCl: Python binding to the Networking and Cryptography (NaCl) library

PyNaCl is a Python binding to the Networking and Cryptography (NaCl) library, providing cryptographic operations such as digital signatures, secret-key and public-key encryption, hashing, and password-based key derivation. The current version is 1.6.2, released on January 1, 2026. PyNaCl follows a regular release cadence, with updates approximately every 1-2 years.