Carnegie Mellon University's Computer Emergency Response Team.

News and editorials on security related topics, along with a database of security knowledge.

News and resources for securing the Mac OS X platform.

Offers current news and articles explaining key IT security concepts.

Search engine/portal for IT professionals focused on Security. Includes search capabilities; links to relevant content; editorial insight, summaries; daily industry news, weekly technology tips delivered via email.

Security news, alerts, product review and resources for enterprise and end users.

The Washington Post's Brian Krebs writes about a wide range of computer security topics.

List of books available in this subject area.

Security research weblog, from the University of Cambridge Computer Laboratory.

Group dedicated to bringing you the latest news and utilities in computer security. Latest exploits with a focus on both Windows and Unix.