security courier service

courier service

courier

postal and courier services

unwitting courier

security agreement (information security, NATO)

Central Security Service (CSS)

Defense Security Service (DSS)

Federal Security Service of the Russian Federation (FSB)

military security service

security service

Security Service / Military Intelligence, Section 5 (MI5)

Security Service of Ukraine (SSU)

site security service

Danish Security and Intelligence Service

United States Air Force Security Service

MIVD (Militaire Inlichtingen- en Veiligheidsdienst / Dutch Military Intelligence and Security Service)

sea surface drone (unique invention of Security Service of Ukraine - SSU)

airport security service

branch (military/service branch, armed service)

separate from active service / the service

Y service (Y-service) / Y-station

regional meteorological service/ regional weather service (RWS)

emergency service / emergency operations service

all-around security

all-embracing system of international security

area security

Area Security Coordination Center (ASCC)

army intelligence and security

Assistant Secretary General for Political Affairs and Security Policy

Assistant to the President for National Security Affairs

battlefield security

border (security) forces /troops