The term "dss" can refer to two different organizations: the Diplomatic Security Service (DSS), the federal law enforcement arm of the U.S. Department of State, and the Department of State Services (DSS), Nigeria's domestic intelligence agency. The Diplomatic Security Service secures U.S. diplomatic missions and personnel worldwide, protects U.S. travel documents, and conducts investigations. The Department of State Services (Nigeria) is responsible for protecting Nigeria against internal threats, upholding criminal laws, and providing criminal justice services.