noun
Activities aimed at protecting an organization's intelligence program from an enemy's intelligence service.
カウンターインテリジェンスは国家安全保障の重要な要素だ。
Counterintelligence is a crucial element of national security.
Refers to intelligence in general, while カウンターインテリジェンス specifically means counterintelligence.
Loanword from English 'counterintelligence'.