Security Service or security service may refer to:
Government Security agency, a nation's institution for intelligence gathering List of security agencies (MI5, NSA, KGB, etc.) (SD), Nazi German agency which translates as "Security Service" MI5, also called the Security Service, the United Kingdom's counter-intelligence and security agency United States Air Force Security Service, a former designation of the US Air Force Intelligence, Surveillance and Reconnaissance Agency RCMP Security Service, the Royal Canadian Mounted Police's political intelligence branch Swedish Security Service Secret service, a government agency concerned with gathering intelligence data Secret police, a police agency beyond the law to protect the political power of a dictator or regime
Other Security service (telecommunication), security architecture for the interconnection of open systems Security and Intelligence Services (India) Private security company Private military company
See also Security Intelligence Service (disambiguation) National Security Service (disambiguation) National Intelligence and Security Service (disambiguation)