Top 2 pythia open source projects

Virgil Crypto is a high-level cryptographic library that allows you to perform all necessary operations for secure storing and transferring data and everything required to become HIPAA and GDPR compliant. Crypto Library is written in C++, suitable for mobile and server platforms and supports bindings with: Swift, Obj-C, Java (Android), С#/.NET, …

This library is designed to be small, flexible and convenient wrapper for a variety crypto algorithms. So it can be used in a small micro controller as well as in a high load server application.