Security4Lib is a shell of a website, wiki and email list for the discussion of issues relating to IT Security in libraries, including, but not limited to, web sites, email, networks, servers, passwords, services, mobile, wifi, and apps.
Like all the other "4Lib" groups, this one is all about libraries, and those people who work in libraries.
There's an email list: https://listserv.nd.edu/cgi-bin/wa?SUBED1=SEC4LIB
There's a Wiki: http://wiki.security4lib.org/
And there's this mostly useless website.
Check out lisnews.org/security for further reading.