The Finnish Security and Intelligence Service is responsible for civilian intelligence and the military intelligence authorities for military intelligence. The duties of the Finnish Security and Intelligence Service and the military intelligence authorities also include the prevention and detection of offences threatening national security. Civilian and military intelligence activities and the prevention and detection of offences by the Finnish Security and Intelligence Service fall within the Intelligence Ombudsman's authority of oversight.
The purpose and subjects of civilian and military intelligence are defined in the intelligence legislation. The diagram below indicates who is responsible for intelligence, as well as how and why it is conducted.