Look up security service in Wiktionary, the free dictionary.

Security Service or security service may refer to:

• Security agency, a nation's institution for intelligence gathering
• List of security agencies (MI5, NSA, KGB, etc.)
• Sicherheitsdienst (SD), Nazi German agency which translates as "Security Service"
• MI5, also called the Security Service, the United Kingdom's counter-intelligence and security agency
• U.S. 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

• Security service (telecommunication), security architecture for the interconnection of open systems
• Security and Intelligence Services (India)
• Private security company
• Private military company

• Security Intelligence Service (disambiguation)

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