The Sigint Secrets: The Signals Intelligence War, 1900 to Today--Including the Persecution of Gordon Welchman

SIGINT is the acronym for 'signals intelligence', the most secret and least understood weapon in the modern espionage arsenal. In this groundbreaking work, the author traces the origins of British signals intelligence and gives a detailed account of SIGINT developments up to the present (1988). Along with details of modern spying techniques are included anecdotes from the inner workings of the UK and the US spy intelligence operations.