What term refers to strategies enlisted for intelligence purposes?

The term that refers to strategies enlisted for intelligence purposes is often encapsulated in the concept of counterintelligence operations. These operations are designed to protect an agency's intelligence activities from adversaries and to undermine the intelligence efforts of opponents. Such strategies may involve deception, surveillance, or security measures that are aimed at identifying and neutralizing threats to intelligence gathering.

In the context of intelligence work, while recruitment methods might focus on acquiring human resources or informants, they do not fully represent the broader set of strategies that can include defensive and offensive operations against hostile intelligence efforts. Therefore, the concept of counterintelligence operations effectively encompasses a range of strategies that are implemented to ensure the integrity and effectiveness of intelligence activities.