The Serviço de Informações de Segurança or SIS (Portuguese for: Security Information Service) is the Portuguese Security and Secret Service agency founded in 1984.[1]
| Serviço de Informações de Segurança | |
 | |
| Secret Service & Intelligence Agency (Internal and External Operations) overview | |
|---|---|
| Formed | 1984 |
| Type | Intelligence service |
| Jurisdiction |  Portugal |
| Headquarters | Lisbon |
| Minister responsible | |
| Secret Service & Intelligence Agency (Internal and External Operations) executive |
|
| Parent Secret Service & Intelligence Agency (Internal and External Operations) | Sistema de Informações da República Portuguesa (SIRP) |
| Website | www.sis.pt |
The function of SIS is to guarantee the internal security and prevent cyber attacks, sabotage, terrorism, espionage and the practice of acts which, by their nature, can change or destroy the Rule of Law as constitutionally established.[2]