The following packages have been uploaded to the Cygwin distribution: * python2-nacl-1.2.1-1 * python3-nacl-1.2.1-1 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. It supports Python 2.7 and 3.4+ as well as PyPy 2.6+.