Hacker
Handprint scanner
Harden
Hardware
Hash function
Hash total
Hashing
Help desk
Heuristic filter
Hexadecimal

Hierarchical database
Hijacking
Honeypot
Horizontal defense-in depth
Hot site
Hub
Human firewall
Hurdle rate
Hybrid application controls
Hyperlink

Hypertext
Hypertext Markup Language
Hypertext Transfer Protocol Secure
Hypertext Transfer Protocol