A highly classified forum in which selected counterintelligence personnel from Canada, Australia, the United States, New Zealand, and Great Britain met periodically to exchange counterintelligence information relating to the KGB and GRU. Created in 1964 by James Angleton, then the Central Intelligence Agency’s chief of counterintelligence, the CAZAB conference met periodically in different secure locations sponsored by the participating sponsoring agency. Membership of this exclusive group was governed by strict rules that excluded a candidate with a single blackball.
CAZAB’s existence was revealed publicly for the first time by Peter Wright in 1986 in SpyCatcher, and when more was revealed by Stella Rimington in her memoir Open Secret, its name was changed.