Counterintelligence
Noun · Security & Infosec
Definitions
Activities aimed at identifying, understanding, and defeating foreign intelligence, insider espionage, or other covert adversarial collection efforts. In enterprise settings, counterintelligence concepts sometimes appear around insider threats and strategic IP protection.
In plain English: Work focused on detecting and stopping espionage or covert intelligence threats.
Example: "The investigation widened from simple insider-risk review into a counterintelligence concern once foreign contacts appeared."