The following packages have been uploaded to the Cygwin distribution: * python36-nacl-1.4.0-1 * python37-nacl-1.4.0-1 * python38-nacl-1.4.0-1 PyNaCl is a Python binding to libsodium, which is a fork of the Networking and Cryptography library. These libraries have a stated goal of improving usability, security and speed.