Dingbat's Warehouse - Information about viruses, intrusion detection software, personal firewalls, and privacy. Hosts a streaming webcast called The Byte Show on security-related topics; CD-ROMs of interviews and software available.
Intrusion Detection FAQ - Frequently asked questions about intrusion detection, from the SANS Institute.
ITsafe - UK government security service to help protect computers, mobile phones and other devices from malicious attack. Offers advice, bulletins, glossary, library and links plus an alerting service.
My online security - Security portal, providing internet security related news, resources, tools and services.