Title:G.C.H.Q. - The Secret Wireless War 1900-86
GCHQ - until recently the initials meant nothing. MI5, MI6 - everyone had heard of them, but what was GCHQ? Here, told for the first time, is the story of GCHQ, the whole history of signals intelligence - that most secret and least understood weapon in the modern espionage arsenal. From that first moment when Marconi succeeded in transmitting a radio signal across the Channel, Britain has been engaged in a secret wireless war, first with the Kairser, then with Hitler and the Soviet Union. All GCHQ's functions and disciplines are described, including direction-finding, code breaking, interception and traffic analysis...
Second hand Paperback