Computerworld's Security Knowledge Center - Provides breaking news articles, features, analysis and commentary on issues of interest to IT professionals. Among the topics included are corporate network security, cybercrime, firewalls, privacy, security holes, viruses and worms.
Astalavista.com - The internet's underground security portal provides daily security downloads, meta search engine, security news, security newsletter, and much more.
Hack in the Box - Designed to facilitate discussions on security related topics, create security awareness, and to provide a comprehensive database of security knowledge and resources to the public. The site provides access to security links and resources, including news, books, mailing lists, tools, products and security services as well.
TechSpot - PC Enthusiast information resource offering product reviews, tweak guides and a complete database of device drivers and OS updates.
GovernmentSecurity.org - Computer and network security articles and hacking prevention resources for the government.
Cgisecurity.com - Dedicated to providing information on secure web development, web and application server security, database security, web application penetration testing, vulnerability news, and more.
InfoSec Institute - InfoSec Institute is an award-winning training institute that has trained thousands of technology professional for over a decade. With our foundation in Security, we have branched out into information assurance, IT Auditing, database, project management, coding, and related vendor training
SearchSecurity.com - A search engine/portal for IT professionals focused on Security. It includes search capabilities, editorial insight, summaries, daily industry news, and weekly technology tips delivered via email.
Calendar of Updates - The Calendar of Updates security portal is dedicated to tracking the latest developments for protective updates as well as evolving threats. We are dedicated to providing timely and quality information to our user community through a volunteer network of highly experienced IT professionals.
TechTutorials.net - TechTutorials provides free computer reference information including a searchable directory of free tutorials, white papers, tips & tricks, FAQs, HOWTOs and other sources of free technical information that cover a wide range of computing and technology topics.
Windows Security Blog – Official security blog from Microsoft.
Microsoft Security Response Center - The MSRC works with partners and security researchers around the world to help prevent security incidents and to advance Microsoft product security.
Dancho Danchev - Mind Streams of Information Security Knowledge. Experienced security consultant Dancho Danchev shares his research interests on information security and new media.
Sans Institute Blog - established in 1989 as a cooperative research and education organization. Its programs now reach more than 165,000 security professionals around the world. A range of individuals from auditors and network administrators, to chief information security officers are sharing the lessons they learn and are jointly finding solutions to the challenges they face.
Ultimate Windows Security - Randy's Blog on Infosec and Other Stuff
Krebs on Security – In depth security news and investigation