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- Computer crimes4
- Computer security2
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- Cyberspace operations (Military science)2
- Cyberterrorism2
- Defense information, Classified2
- Espionage2
- Espionage, Soviet2
- Hess, Markus2
- History2
- Information warfare2
- Internet in espionage2
- National security2
- Prevention2
- Security measures2
- Stoll, Clifford2
- TECHNOLOGY & ENGINEERING / Military Science1