The aim of the Cryb.to project is to provide a collcetion of correct, well-written, well-tested and well-documented implementations of both low-level cryptographic primitives and higher-level security-related interfaces under a permissive license. The Cryb libraries are the first and primary product of the Cryb.to project. They include low-level cryptographic primitives and support code such as safe string handling and containers.