countersubversion

That aspect of counterintelligence designed to detect, destroy, neutralize, or prevent subversive activities through the identification, exploitation, penetration, manipulation, deception, and repression of individuals, groups, or organizations conducting or suspected of conducting subversive activities.

Thesaurus

Noun

1.

countersubversion - the aspect of counterintelligence designed to detect and prevent subversive activities counterintelligence - 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