Ministry of Public Security (Poland) in the context of "Lustration in Poland"

The Polish United Workers' Party (Polish: Polska Zjednoczona Partia Robotnicza [ˈpɔlska zjɛdnɔˈt͡ʂɔna ˈpartja rɔbɔtˈɲit͡ʂa], PZPR) was the communist party which ruled the Polish People's Republic as a one-party state from 1948 to 1989. The PZPR had led two other legally permitted subordinate minor parties together as the Front of National Unity and later Patriotic Movement for National Rebirth. The Polish United Workers' Party had total control over public institutions in the country as well as the Polish People's Army, the UB and SB security agencies, the Citizens' Militia (MO) police force and the media.

The falsified 1947 Polish legislative election granted the Communist Polish Workers' Party (PPR) complete political authority in post-war Poland. The PZPR was founded forthwith in December 1948 through the unification of the PPR and the Polish Socialist Party (PPS). From 1952 onward, the position of "First Secretary" of the Polish United Workers' Party was de facto equivalent to Poland's head of state. Throughout its existence, the PZPR maintained close ties with ideologically-similar parties of the Eastern Bloc, most notably the Socialist Unity Party of Germany, Communist Party of Czechoslovakia and the Communist Party of the Soviet Union. Between 1948 and 1954, nearly 1.5 million individuals registered as Polish United Workers' Party members, and membership rose to 3 million by 1980.

Rudolf Reder a.k.a. Roman Robak (April 4, 1881 – October 6, 1977) was one of only two survivors of the Bełżec extermination camp. His testimony after the war became very well known. He submitted a deposition to the Main Commission for the Investigation of German Crimes in January 1946 in Kraków. In terms of the number of Polish Jews who perished in its gas chambers, Bełżec had the third highest death toll among the six Nazi death camps located in occupied Poland, estimated between 500,000 and 600,000 men, women and children. Only Auschwitz-Birkenau and Treblinka killed more people during the Holocaust.

The postwar testimony of Reder was of special significance. This is because Chaim Hirszman, the only other survivor of Bełżec, joined the new communist militia in Stalinist Poland shortly after the war and was himself murdered in March 1946 by anti-communist forces before he was able to give a full account of his camp experience.

Jakub Berman (23 December 1901 – 10 April 1984) was a Polish communist politician. An activist during the Second Polish Republic, in post-war communist Poland he was a member of the Politburo of the Polish Workers' Party (PPR) and then of the Polish United Workers' Party (PZPR). From 1948, he was considered the second most powerful politician in Poland after President Bolesław Bierut, until he was removed from power in 1956, following Bierut's death.

Alongside Bierut, Berman was responsible for party oversight of the Stalinist Ministry of Public Security, commonly known as the "UB". Under Berman's leadership, 200,000 people were imprisoned for alleged political crimes, and 6,000 were executed.

Ministry of Public Security can refer to:

• Ministry of Justice and Public Security (Brazil)
• Ministry of Public Security of Burundi
• Ministry of Public Security (Chile)
• Ministry of Public Security (China)
• Ministry of Public Security of Costa Rica, supervising the Public Force of Costa Rica
• Ministry of Public Security (Israel)
• Ministry of Public Security (Mexico City)
• Ministry of Justice and Security (Netherlands)
• Ministry of Public Security (North Korea)
• Ministry of Public Safety and Security (South Korea)
• Ministry of Public Security of Panama, supervising the Panamanian Public Forces
• Ministry of Public Security (Poland)
• Ministry of Public Security (Quebec)
• Ministry of Public Security (Vietnam)

The Security Service (Polish: Służba Bezpieczeństwa; Polish pronunciation: [ˈswuʐba bɛspʲeˈt͡ʂɛɲstfa]), in full Security Service of the Ministry of Internal Affairs and commonly known as SB, was a secret police force established in the Polish People's Republic in 1956 as a successor to the Ministry of Public Security (UB). The SB was the chief foreign and domestic security organization in Poland from 1956 until the fall of communism in 1989.

The parent agency of SB, the Ministry of Internal Affairs, had been established in 1954, but the Ministry did not play a significant role until the winding-up of the Committee for Public Safety in 1956.