What term describes information gathered to protect against espionage?

The term that describes information gathered to protect against espionage is "counterintelligence." This involves efforts and activities aimed at detecting, preventing, and thwarting espionage efforts by adversaries. Counterintelligence measures include the collection and analysis of information related to potential threats to national security, thereby helping safeguard sensitive information and operations from foreign intelligence services.

Counterintelligence is crucial in maintaining the security of classified information and the integrity of intelligence processes. It encompasses both defensive and offensive strategies, ensuring that organizations can defend against threats posed by spies and other intelligence operations. By effectively employing counterintelligence practices, organizations can minimize the risk of information compromise and enhance their overall security posture.