Eastern Bloc intelligence agencies

The Committee for State Security (, ), abbreviated as KGB (, ; ) was the main security agency of the Soviet Union from 1954 to 1991. It was the direct successor of preceding Soviet secret police agencies including the Cheka, OGPU, and NKVD. Attached to the Council of Ministers, it was the chief government agency of "union-republican jurisdiction", carrying out internal security, foreign intelligence, counter-intelligence and secret police functions. Similar agencies operated in each of the republics of the Soviet Union aside from the Russian SFSR, where the KGB was headquartered, with many ass

The Department of State Security (), commonly known as the Securitate (, ), was the secret police agency of the Socialist Republic of Romania. It was founded on 30 August 1948 from the Siguranța with help and direction from the Soviet MGB.

former Hungarian espionage agency

police agency of Yugoslavia

The Directorate of State Security (, DSSh), commonly called the Sigurimi (which in Albanian means "Security"), was the state security, intelligence and secret police service of the People's Socialist Republic of Albania. Its proclaimed goal was maintaining state security of Albania, which meant it de facto also served to suppress opposing political activity among the populace and preserve the existing political system. It was regarded as one of the most feared, most repressive, and most brutal secret police agencies to ever exist.

State Security (, ), or StB / ŠtB, was the secret police force in communist Czechoslovakia from 1945 to its dissolution in 1990. Serving as an intelligence and counter-intelligence agency, it dealt with any activity that was considered opposition to the Communist Party of Czechoslovakia and the state.

secret service of Poland from 1956 to 1989

The Department for Protection of the People, commonly known under its Serbo-Croatian acronym as OZNA, was the secret police of Communist Yugoslavia that existed between 1944 and 1946.

former name for the Bulgarian secret service

counterintelligence of Yugoslav People Army

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secret police agency of Communist Poland