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.

Place for pictures and information pertinent to the monthly 2600 meetings held in Western Massachusetts.

Underground Hacker site with an extensive archive and library.

SoCal's hacking group. Canadian free since 1999.

Hacking related group.

Canada's Largest Hacking and Phreaking meetings. Picking up where the great Hack Canada left the Edmonton 2600 meetings in 2002.

Security research site with quality papers and exploits

Where hackers, crackers, phreaks, and geeks hang out and discuss technology and network security with other like-minded folks.

Pennsylvania group. Meeting information and links.

Team of security researchers. Features news, original papers and advisories, presentations they have given, and tools they have written.

A collection of current hacker news articles.

Security advice and exploits.

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

A New York hacker group.

One of the longest-running and most active 2600 meetings, complete with information on how to find it and reviews of past meetings.

First friday of every month at 8PM in the Wow Superstore located at Sahara + Decatur.

Anarchy, HAcking, Phreaking files for newbies.

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

Coding group. Offer hacking tools and vulnerability exploits.

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