SANS Institute: The SANS reading room has more than 1,600 free white papers covering a vast range of security topics, such as disaster recovery, legal issues, mainframes, logging technology, VoIP, Windows, storage and many more. The site is run by SANS, a provider of information security training, certification courses and research. Even for people who'd rather not pay for SANS training, there are plenty of resources including an "Internet Storm Center" that analyzes recent exploits and security news. (Click to close this window)