• CERT* Coordination Center
• Bugtraq
• Secure Shell Home Page
• Rootshell, start here
• ftp://ftp.porcupine.org/pub/security
• The Linux Security Home Page
• Improving the Security of your Site by Breaking Into It
• patch up your kernel for more security
• BugNet
• A Nice list of DDoS kits
• Cyphernet
• Interesting Security Links
• Computer and Internet Security Resources
• Harvard Information Infrastructure Project Policy Gateway
• HotJava(tm) Browser SSL and Certificate Preferences
• Verisign
• http://digitalid.verisign.com/server/about/aboutFAQ.htm
• How much do Digital IDs cost?
• PKEApplet
• Java PGP Mail Paul Ramsey

Cryptography and security related protocols

• Getting Started with encryption: An Introduction to PGP
• GnuPG site
• SSL 3.0 specification document
• ftp.funet.fi:/pub/crypt/cryptography/pgp
• OpenSSL site
• Secure Socket Layer (SSL)
• Secure Hypertext Transfer Protocol (SHTTP)