Sodium is a modern, easy-to-use software library for encryption, decryption, signatures, password hashing, and more.
It is a portable, cross-compilable, installable, and packageable fork of NaCl, with a compatible but extended API to improve usability even further.
Its goal is to provide all of the core operations needed to build higher-level cryptographic tools.
The design choices emphasize security and ease of use. But despite the emphasis on high security, primitives are faster across-the-board than most implementations.