Secret police

State Security (Czech: Státní bezpečnost, Slovak: Štátna bezpečnosť) or StB / ŠtB, was a plainclothes secret (political) police force in former Czechoslovakia from 1945 to its dissolution in 1990.

The Special Organization (Ottoman Turkish: تشکیلات مخصوصه‎, Teşkilât-ı Mahsusa) was an Ottoman imperial government special forces unit under the War Department and was allegedly used to suppress Arab separatism and Western imperialism under Ottoman Empire.

The Joint State Political Directorate (also translated as the All-Union State Political Administration and Unified State Political Directorate) was the secret police of the Soviet Union from 1923 to 1934.

The Department for Protecting the Public Security and Order (Russian: Отделение по Охранению Общественной Безопасности и Порядка), usually called "guard department" (okhrannoye otdelenie) and commonly abbreviated in modern sources as Okhrana or Okhranka in Russia, was a secret police force of the Russian Empire and part of the police department of the Ministry of Internal Affairs (MVD) in the late 19th century, aided by the Special Corps of Gendarmes.

Cheka (ЧК – чрезвыча́йная коми́ссия chrezvychaynaya komissiya, Emergency Committee, Russian pronunciation: [tɕɪˈka]) was the first of a succession of Soviet state security organizations.

A death squad is an armed group that conducts extrajudicial killings or forced disappearances of persons for the purposes of political repression, genocide, or revolutionary terror.

The State Protection Authority (Hungarian: Államvédelmi Hatóság or ÁVH) was the secret police of Hungary from 1945 until 1956.

The PIDE or International and State Defense Police (Portuguese: Polícia Internacional e de Defesa do Estado), was a Portuguese security agency that existed during the Estado Novo regime of António de Oliveira Salazar.

Counterintelligence (CI) refers to information gathered and activities conducted to protect against espionage, other intelligence activities, sabotage, or assassinations conducted for or on behalf of foreignpowers, organizations or persons or international terrorist activities, but not includingpersonnel, physical, document or communications security programs.

The Organizzazione per la Vigilanza e la Repressione dell'Antifascismo (OVRA; Italian for "Organization for Vigilance and Repression of Anti-Fascism") was the secret police of the Kingdom of Italy, founded in 1927 under the regime of Fascist dictator Benito Mussolini and during the reign of King Victor Emmanuel III.

The Drejtoria e Sigurimit të Shtetit (Directorate of State Security), commonly called the Sigurimi, was the state security, intelligence and secret police service of the Socialist People's Republic of Albania.

The State Security Service (SDB or SDS), more commonly known by its original name as the State Security Administration (UDBA or UDSA), was the secret police of Yugoslavia.

The National Intelligence and Security Service (Arabic: جهاز الأمن والمخابرات الوطني السوداني‎‎, Jihaaz Al Amn Al Watani Wal Mukhaabaraat) is the intelligence service of the federal government of Sudan.

DISIP (General Sectoral Directorate of Intelligence and Prevention Services) was an intelligence and Counter-intelligence agency inside and outside of Venezuela between 1969 and 2009 when SEBIN was created by former President Hugo Chavez.

The Greek Military Police (Greek: Ελληνική Στρατιωτική Αστυνομία), generally known in Greek by the acronym ESA (Greek: ΕΣΑ), was the military police branch of the Greek Army in the years 1951–1974.

The Egyptian State Security Investigations Service (SSI) (Arabic: مباحث أمن الدولة, Transliteration: Mabahith Amn ad-Dawla) was the highest national internal security authority in Egypt.

The Financial Crimes Investigation Division (Sinhalese: මූල්‍ය අපරාධ විමර්ශන අංශය; Tamil: நிதி குற்றம் புலனாய்வு பிரிவு; known as FCID) is the law enforcement agency of the Sri Lankan government.

The Iraqi Intelligence Service (Jihaz Al-Mukhabarat Al-Amma), also known as the Mukhabarat, General Directorate of Intelligence, or Party Intelligence, was the main state intelligence organization in Iraq under Saddam Hussein.

The Taiwan Garrison Command (traditional Chinese: 台灣警備總司令部; simplified Chinese: 台湾警备总司令部; pinyin: Táiwān Jǐngbèi Zǒngsīlìngbù; Wade–Giles: Tai-wan Ching-pei Tsung-ssu-ling-pu) was a secret police/state security body which existed under the Republic of China Armed Forces on Taiwan.

The National Security Service (Uzbek Milliy Xavfsizlik Xizmati, MXX; in Russian Служба национальной безопасности, СНБ, often romanised as SNB) is the national intelligence agency of the government of Uzbekistan.

The National Security Service (NSS) was the primary intelligence agency of Somalia under the government of Siad Barre.

The National Security Agency or National Security Apparatus (Arabic: جهاز الأمن الوطني‎‎) is an investigating authority in Bahrain that is associated with but not formally part of the Ministry of the Interior.

Special Higher Police (特別高等警察 Tokubetsu Kōtō Keisatsu), often shortened to Tokkō (特高 Tokkō), was a police force established in 1911 in Japan, specifically to investigate and control political groups and ideologies deemed to be a threat to public order.

The Central Intelligence Organisation (CIO) is the national intelligence agency or "secret police" of Zimbabwe.

The State Security Department of North Korea or the Ministry of State Security is the secret police agency of North Korea.

The Directorate General of Military Counterintelligence (DGCIM) is the military counterintelligence agency of Venezuela whose function is to prevent intelligence or espionage internally and externally enemy by military and civilians.

The Bolivarian National Intelligence Service (Spanish: Servicio Bolivariano de Inteligencia Nacional, SEBIN) is the premier intelligence agency in Venezuela.