On-access scanning
Scanning files for malware when they are accessed
Anti-malware
Anti-spyware
Anti-virus
Behaviour blocker
Blacklist
CAPTCHA
Challenge-response
Content filtering
Demilitarized Zone
Encryption
Firewall
Heuristics
Intrusion detection system
Intrusion prevention system
Layered defence
OCR
Patch
Patch Tuesday
Public Key Cryptography
Service pack
Spam filter
URL filtering
Walled garden
Whitelisting
See also
Glossary
Resources
Poll
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VB2009
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