Yes, libhydrogen is a pun, as it is lighter than libsodium. The first version was a rewrite of libsodium, that was small and contained in a single C file. Also

Yes, libhydrogen is a pun, as it is lighter than libsodium. The first version was a rewrite of libsodium, that was small and contained in a single C file. Also introduced xchacha20 for the first time. Then, the Gimli paper was published, and libhydrogen was rewritten to take advantage of it. Smaller than libhydrogen, there's now charm: https://github.com/jedisct1/charm https://github.com/jedisct1/charm , also a pun. The plan was to eventually add bottom (platform abstraction layer), strange (asymmetric cryptography), and top (high-level APIs) to build a modular, component-based library.