English version

counter-espionage

From Longman Dictionary of Contemporary Englishcounter-espionageˌcounter-ˈespionage noun [uncountable]  the process of trying to stop someone spying on your country
Examples from the Corpus
counter-espionageWithout ciphers and diplomatic bags, espionage and counter-espionage actions were likely to be circumscribed.But the republican counter-espionage was highly organized, and early in 1814 he was arrested, tried and condemned to death.They're political - a small counter-espionage unit.
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