# BLAKE2 This is the reference source code package of BLAKE2, which includes * `ref/`: C implementations of BLAKE2b, BLAKE2bp, BLAKE2s, BLAKE2sp, aimed at portability and simplicity. * `sse/`: C implementations of BLAKE2b, BLAKE2bp, BLAKE2s, BLAKE2sp, optimized for speed on CPUs supporting SSE2, SSSE3, SSE4.1, AVX, or XOP. * `csharp/`: C# implementation of BLAKE2b. * `b2sum/`: Command line utility to hash files, based on the `sse/` implementations. * `bench/`: Benchmark tool to measure cycles-per-byte speeds and produce graphs copyright. All code is licensed under CC0. More: [https://blake2.net](https://blake2.net). Contact: contact@blake2.net