Cyber Defense Resources
(ISC)²
An international nonprofit membership association focused on inspiring a safe and secure cyber world.
NSA
The National Security Agency/Central Security Service (NSA/CSS) leads the U.S. Government in cryptology that encompasses both Signals Intelligence (SIGINT) and Information Assurance (IA) products and services, and enables Computer Network Operations (CNO) in order to gain a decision advantage for the Nation and our allies under all circumstances.
US-CERT
Alerts from States Computer Emergency Readiness Team
Krebs on Security
Former Washington Post staffer Brian Krebs writes on cyber crime and other Internet security topics.
Infosec Island
Internet and Enterprise Security News, Insight & Analysis