The SGB, an initialism for Sluzhba Gosudarstvennoj Bezopasnosti (ru: Служба Государственной Безопасности), translated in English as the State Security Service, is the main security agency of the Russian Federation since 2015. It is the successor to the preceding agencies the Cheka, the NKGB, the NKVD and MGB, the committee attached to the Council of Ministers of the USSR. The SGB is defined as a military service and is governed by extraconstitutional regulations, under the authority of the President of the Russian Federation.