SECU625 Counterintelligence - United Kingdom Cheat Sheet by 0341569a

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."

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."­

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."

Jeremy Fleming, head of the British Government Commun­ica­tions Headqu­arters.

Andrew Parker, Direct­or-­General of the British Security Service.

Alex Younger, Chief of the Secret Intell­igence Service.