counterintelligence

Từ điển WordNet v3.1 - WordNet Dictionary

noun

intelligence activities concerned with identifying and counteracting the threat to security posed by hostile intelligence organizations or by individuals engaged in espionage or sabotage or subversion or terrorism
• Topics:
terrorism, act of terrorism, terrorist act
• Hypernyms:
intelligence, intelligence activity, intelligence operation
• Hyponyms:
counterespionage, security intelligence, censoring, censorship, security review,
countersubversion, counter-sabotage