Secunia - Secunia is a portal designed to provide the best possible overview of the latest and most interesting vulnerability information. Secunia advisories are primarily selected based on the affected software's popularity and the criticality/impact of the vulnerability with special emphasis given to new or special types of vulnerabilities.
Zero Day Initiative - The Zero Day Initiative (ZDI), founded by TippingPoint, a division of 3Com, represents a best-of-breed model for rewarding security researchers for responsibly disclosing discovered vulnerabilities.
Security Focus Blogs - An aggregation of blogs from the Matasano Security Team of interest to the cyber security community.
http://www.securityfocus.com/blogs
IWS - The Information Warfare Site is an online resource that aims to stimulate debate on a variety of issues involving information security, information operations, computer network operations, homeland security and more.
iDefense Labs is dedicated to Vulnerability, Malicious Code and Cyber Threat research. It supports the iDefense Research Teams and provides tools and resources for independent security researchers.
The Ponemon Institute - The Ponemon Institute is dedicated to advancing responsible information and privacy management practices in business and government.
Internet Storm Center -The ISC provides a free analysis and warning service to thousands of Internet users and organizations, and is actively working with Internet Service Providers to fight back against the most malicious attackers.
DATA BREACHES - These organizations provide information about data breaches:
Privacy Rights Clearinghouse - A chronology of data breaches since 2005, with information about what to do if your information is compromised. http://www.privacyrights.org/ar/ChronDataBreaches.htm
The link below accesses a chart which provides information regarding security breach notification legislation which has been enacted in U.S. jurisdictions, from Perkins Coie. http://www.perkinscoie.com/statebreachchart/
Neohapsis also has a comprehensive list of data breaches. They provide independent information risk and security consulting, forensic services, and product testing. http://archives.neohapsis.com/archives/dataloss/2007-01/
SearchFinancialSecurity.com - A new website designed for security pros who work in the financial sector. A wealth of information is organized into four main sections: Regulations and Compliance, Management Strategies, Business Practice Security, and Security Technology.