Counterintelligence
Identifying, understanding and disrupting hostile intelligence activity.
Counterintelligence encompasses the institutions, policies and practices designed to identify and counter espionage, hostile intelligence operations, insider threats and attempts to compromise sensitive information.
Explore the history, principles, organizations and evolving challenges of counterintelligence, from traditional espionage investigations to modern cyber intelligence threats.
Explore Counterintelligence
Browse six specialized fields covering the foundations, threats, institutions and history of counterintelligence.
Foundations of Counterintelligence
Historical development, definitions, strategic principles, doctrine and the institutional foundations of counterintelligence.
Explore Field → FIELD 02Espionage & Foreign Intelligence Threats
Foreign intelligence services, clandestine networks, espionage activity and threats to national security.
Explore Field → FIELD 03Counterespionage & Investigations
Counterespionage investigations, intelligence assessments, detection of hostile activity and investigative history.
Explore Field → FIELD 04Insider Threats & Security
Insider risks, personnel security, information protection, security breaches and organizational resilience.
Explore Field → FIELD 05Cyber Counterintelligence
Cyber espionage, digital infiltration, persistent threats and the protection of sensitive information systems.
Explore Field → FIELD 06Historical Cases & Intelligence Services
Major espionage cases, intelligence organizations, historical operations and notable counterintelligence figures.
Explore Field →Latest Counterintelligence Articles
Recently published encyclopedia entries from Counterintelligence and its specialized categories.
Explore the Knowledge Base
Search Open Chronicle for counterintelligence terminology, intelligence organizations, historical cases and related subjects.