SECU625 Counterintelligence - United Kingdom Cheat Sheet by 0341569a
A Few Important Dates in History
Signals intelligence (SIGINT), somewhat similar to the National Security Agency (NSA). "Using our expertise and experience GCHQ is part of the team which protects the UK, along with law enforcement and the other intelligence agencies. Working with HMG and industry, we defend Government systems from cyber threat, provide support to the Armed Forces and strive to keep the public safe, in real life and online."
Security Service (MI5) Mission
Domestic intelligence. "The role of MI5, as defined in the Security Service Act 1989, is the protection of national security and in particular its protection against threats such as terrorism, espionage and sabotage, the activities of agents of foreign powers, and from actions intended to overthrow or undermine parliamentary democracy by political, industrial or violent means."
Secret Intelligence Service (MI6) Mission
Foreign intelligence. "We work secretly overseas, developing foreign contacts and gathering intelligence that helps to make the UK safer and more prosperous. We help the UK identify and exploit opportunities as well as navigate risks to our national security, military effectiveness and economy. We work across the globe to counter terrorism, resolve international conflict and prevent the spread of nuclear and other non-conventional weapons."