Behind the Enigma: The Authorized History of GCHQ, Britain’s Secret Cyber-Intelligence Agency

John Ferris is a professor of history at the University of Calgary, where he is also a fellow at the Centre for Military, Security and Strategic Studies. He received a PhD in war studies from King's College London. He is the author of numerous academic articles on diplomatic intelligence and military history, as well as on contemporary strategy and intelligence. He lives in Calgary, Canada.