Security related stuff

• NIST Computer Security Resource Clearinghouse.
• Cyber Incident Response Capability (U.S. Department of Energy)
• PGP (Pretty Good Privacy)
• Cryptography/Steganography

Anonymous FTP

• Anonymous FTP FAQ
• How do I set up an anonymous ftp directory? (From my own FAQ)

SATAN

!#>
• Administrator's Guide To Cracking

Miscellaneous

• National Cryptologic Museum
• Guide to Lock Picking
• TSCM.COM Counterintelligence and Counterterrorism Home Page (TSCM = Technical Surveillance Countermeasures)
• Things that Go Bump in the Net (a brief look at some of the more colorful characters in the menagerie of network security threats)