External Security Related Sites

• SecurityFocus Online
• InfoSysSec
• Network & Internet Security Resource Center
• The Bishop's Link

Vulnerability & Exploit Databases

• Common Vulnerabilities and Exposures
• AltalaVista
• Security.NNov
• TLSecurity
• Out Comm
• Packet Storm

Papers / Books / Reading Lists

• Cryptome
• Ktwo's Book List
• Crypto-Gram
• Fyodor's Good Reading List
• Phrack

Security Related Mailing Lists

• Neohapsis Archives
• SecurityFocus Mailing Lists