- HackerThreads.org - Security Forum
- Discussion forums with tutorials, Hacking programs and miscellaneous threads. - Cyber Terrorists - Contains tutorials on protection from attacks and common phishing techniques. Provides educational information on malware.
- HFX International Forum - Discussion forum for topics surrounding the underground, technology and the like.
- SecureRoot - One of the worlds longest established hacking forums, offering resources covering everything from cracking to phreaking.
- Social Engineering - Discussion forum about the insecurity of humans known as social engineering.
- The Forbidden Web Archive - Security and Development Forum with a Security Basics Forum and Vuln-Dev.
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- Irvine Underground Forums (RSS) - Discussion forum for Southern California security experts and hackers.
