名詞 counterintelligence:

1. 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

coun.ter.in.tel.li.gence

n.（名詞）
The branch of an intelligence service charged with keeping sensitive information from an enemy, deceiving that enemy, preventing subversion and sabotage, and collecting political and military information.
反情報(bào)組織：情報(bào)組織的一個(gè)分支，任務(wù)是使敵人得不到高級(jí)機(jī)密，欺騙敵人，避免顛覆和陰謀破壞并收集政治和軍事情況