What are the four major secret service agencies in the world?

The KGB of the Soviet Union (which was transformed into the Russian Federal Security Service after the disintegration of the Soviet Union), together with British MI 6, the US Central Intelligence Agency and the Israeli Mossad, is called the four largest intelligence organizations in the world.

1. KGB, full name of "Soviet National Security Council", referred to as KGB for short, was the intelligence agency of the Soviet Union from March 13th, 1954 to November 6th, 1991, and was famous for its strength and intelligence. KGB has always been the main department in charge of the Soviet Union's foreign intelligence work, anti-espionage, domestic security work and border defense. It is a "super institution" above all departments of the party, government and army, and it is only responsible for Soviet the Political Bureau of the Central Committee. KGB is called "the largest spy agency gathering secret information in the world" by British intelligence agencies.

2. British MI6. The full name of MI6 is military intelligence 6, also known as Secret Intelligence Agency, abbreviated as SIS, code-named MI6. It is also known as "Government Telecommunications Bureau" or "Office of the Permanent Deputy Secretary of the British Foreign Office". Western intelligence circles regard MI6 as the "founder" of British intelligence agencies. From the early days of Elizabeth's creation to the present, it and its predecessor are strictly confidential, also known as the Secret Intelligence Service, which was originally an overseas intelligence system of British intelligence agencies.

3. The United States Central Intelligence Agency (CIA). Its main task is to openly and secretly collect and analyze information about foreign governments, companies, terrorist organizations, individuals, politics, culture, science and technology, coordinate the activities of other domestic intelligence agencies, and report these information to the work of various departments of the US government. The US Central Intelligence Agency is also responsible for maintaining a large number of military equipment, which was used to prepare for overthrowing foreign governments during the Cold War. The US Central Intelligence Agency is divided into four main components: Intelligence Service, Management Service, Operations Service and Science and Technology Service. Information technology personnel are mostly highly educated or experts in certain fields. The organization, personnel, funds and activities of this institution are strictly confidential, and even Congress cannot ask.

4. Mossad, called Mossad in English, is the Israeli Intelligence and Special Mission Bureau. It was established by the Israeli military in 1948 and is famous for its boldness, radicalism and secrecy. Mossad was formed with the development of Zionism and the establishment of the State of Israel. Before Israel's independence, there was a secret Jewish military organization, Hagana, in the Palestinian area. This organization was established for the purpose of secretly purchasing weapons, smuggling weapons and organizing illegal immigrants from Jews in the Palestinian area, and the intelligence gathering for these activities was carried out by a Shaya intelligence agency attached to Hagana. After the establishment of the State of Israel in 1948, "Hagana" was replaced by "Israel Defense Forces", and six weeks later, "Shaya" was replaced by "Foreign Intelligence Agency", which was the predecessor of Mossad.

Extended information:

The four most famous intelligence organizations in the world are: the CIA of the United States, the KGB of the former Soviet Union, MI6 of Britain and Mossad of Israel. In addition to these four intelligence organizations, the famous intelligence organizations include the French General Administration of Foreign Security and the German Federal Constitutional Protection Agency.

The French General Administration of Foreign Security, also known as the Seventh Bureau, is the largest intelligence and anti-espionage agency in France. It was renamed in April 1982. The General Administration of Foreign Security consists of intelligence investigation department, anti-espionage department, action department and other departments. The bureau is mainly responsible for comprehensively collecting all kinds of intelligence from various countries and monitoring activities that undermine French national security. Headquartered in the old military camp of Mortier near the Tuwell swimming pool in the twentieth district of Paris, France, it is called "swimming pool".

The German Federal Constitutional Protection Agency is a German anti-espionage agency under the jurisdiction of the Ministry of the Interior. It consists of Basic Law Issues Department, Anti-Spy Department, Secret Security Department, Anti-Right Radical Department and Anti-Left Radical Department, and its headquarters is located in Ehrenfeld, a suburb of Cologne.

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