These are Go versions of the C examples described in Using ZeroMQ Security (part 2) by Pieter Hintjens. Those C examples use the zauth module in the czmq library.

There are some differences:

• The zauth module doesn't handle domains. The Go version does.
• The zauth module handles files with usernames/passwords and directories with certificates. The Go version just uses maps of usernames/passwords and lists of public user keys.