Counter-intelligence is synonymous with counter-espionage.
Counterintelligence will try to protect an agency its intelligence program from an adversary intelligence service. Counter Intell activities consist of:
- gathering information on adversaries
- conducting activities to prevent espionage
- prevent acts of sabotage
- prevent assassinations
- prevent intelligence activities conducted by foreign powers, organizations, or private entities
Collective counterintelligence will gain intelligence into the adversary (the enemy) their own intelligence-gathering capabilities.
Defensive counterintelligence will try to disable or hinder efforts by hostile intelligence services to penetrate their own intelligence service.
In general private counterintelligence focuses on identifying and neutralizing ongoing active or passive security threats surrounding or targeting your organization or company.