Counterintelligence refers to the activities and strategies used to detect, prevent, and neutralize espionage, sabotage, or intelligence-gathering efforts conducted by foreign entities or adversaries. In cybersecurity, counterintelligence involves monitoring for insider threats, identifying attempts to steal sensitive data, and thwarting cyberattacks that aim to compromise national security or organizational assets. These efforts may include surveillance, analysis of suspicious activities, and collaboration with law enforcement agencies. The primary goal is to protect information, infrastructure, and operations from being exploited by hostile actors, ensuring the confidentiality, integrity, and availability of critical resources.