Template:Infobox Government agency The Serviço de Informações de Segurança or SIS (Portuguese for: Security Information Service) is the Portuguese Intelligence and Secret Service agency founded in 1984.

The function of SIS is to guarantee the internal security and prevent sabotage, terrorism, espionage and the practice of acts which, by their nature, can change or destroy the Rule of Law as constitutionally established.

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es:Servicio de Informaciones de Seguridad fr:Serviço de Informações de Segurança pt:Serviço de Informações de Segurança