Security research team. Security papers, presentations and tools.

Belgian group specialized in computer and network (in)security, hacking, coding and phreaking.

CyberWarrior specializes in tutorials, downloads ,and other information.

Attrition is an eclectic collection of internet and computer security resources.

Offers blog, team background, tools and BackOrifice downloads, and news archive.

Exploit archive, phreaking information, and group member pages.

Offers details regarding select viruses, overflow and security exploits, bios tools, and crytography. Also features book reviews on assembly programming and computer security.

Coding group. Offer hacking tools and vulnerability exploits.

Group of hackers in the United Kingdom. Information about meetings, projects, and links to personal pages.

Anarchy, HAcking, Phreaking files for newbies.

A New York hacker group.

Hacker lab engaged in vulnerabilities research. Security papers, full disclosure advisories and current projects. Also features a FAQ on hacking techniques.

Security advice and exploits.

A collection of current hacker news articles.

Security research site with quality papers and exploits

Hacking related group.

SoCal's hacking group. Canadian free since 1999.

Underground Hacker site with an extensive archive and library.

Organization dedicated to the research and demonstration of vulnerabilities in network services and communication security. Offers papers, security tools, exploit code, advisories and a discussion forum.