A good introduction to the mind of the hacker. Computer virus information . In postscript format. A variety of security topics. The Electronic Frontier Foundation is a public interest group that has alot of information on cryptography and its impact on privacy issues.
Firewalls are a hot topic.
The SOS Corporation has a good Introduction to Firewalls page. Department of Energy's Computer Incident Advisory Capability CIAC Home Page. The Hacker Crackdown, Law and Disorder on the Electric Frontier by Bruce Sterling. An online copy of The Hacker Crackdown can be obtained here .