KGB

1.
the intelligence and internal-security agency of the former Soviet Union, organized in 1954 and responsible for enforcement of security regulations, protection of political leaders, the guarding of borders, and clandestine operations abroad.
abbreviation
1.
the former Soviet secret police, founded in 1954 Compare GRU

national security agency of the Soviet Union from 1954 to 1991, attested from 1955 in English, initialism of Russian Komitet gosudarstvennoy bezopasnosti “Committee for State Security.”

The secret police of the former Soviet Union.
Russian Komitet Gosudarstvennoj Bezopasnosti (Committee for State Security)