The Bletchley Park Codebreakers

Summary

Bletchley Park was the site of Britain's main decryption center, the Government Code and Cypher School. This extraordinary book includes essays by some of Britain's foremost historians and academics and traces the legacy of Bletchley Park from the innovative work which led to the breaking of Enigma and other wartime codes to the invention of modern computing and its influence on Cold War codebreaking. Crucially, it also features contributions from former Bletchley Park codebreakers, whose personal reminiscences and very human stories of life and work in wartime Bletchley make compelling reading. Michael Smithis the author of Killer Elite. Ralph Erskineis one of Britain's leading historians of wartime codebreaking.

Author Biography

Ralph Erskine is one of Britain's leading historians of wartime codebreaking. Michael Smith is an award-winning journalist for the Sunday Times, and acclaimed author of Station X and The Emperor's Codes.

Acknowledgements	p. ix
Letter from the Bletchley Park codebreakers to Churchill	p. x
Dramatis Personae	p. xiv
Bletchley Park in Pre-War Perspective	p. 1
The Government Code and Cypher School and the First Cold War	p. 13
Reminiscences on the Enigma	p. 35
Breaking Air Force and Army Enigma	p. 40
Hut 6 From the Inside	p. 65
Breaking Italian Naval Enigma	p. 79
A Biographical Fragment: 1942-5	p. 93
An Undervalued Effort: How the British Broke Japan's Codes	p. 107
Solving JN-25 at Bletchley Park: 1943-5	p. 127
Most Helpful and Co-operative: GC&CS and the Development of American Diplomatic Cryptanalysis, 1941-2	p. 147
Breaking German Naval Enigma on Both Sides of the Atlantic	p. 165
Hut 8 From the Inside	p. 184
Bletchley Park and the Birth of the Very Special Relationship	p. 195
Mihailović otTito? How the Codebreakers Helped Churchill Choose	p. 217
Traffic Analysis: A Log-reader's Tale	p. 240
Bletchley Park, Double Cross and D-Day	p. 251
How Dilly Knox And His Girls Broke the Abwehr Enigma	p. 270
Breaking Tunny and the Birth of Colossus	p. 283
Colossus and the Dawning of the Computer Age	p. 305
Enigma's Security: What the Germans Really Knew	p. 328
From Amateurs to Professionals: GC&CS and Institution-Building in Signals Intelligence	p. 341
Cold War Codebreaking and Beyond: the Legacy of Bletchley Park	p. 355
Bletchley Park in Post-War Perspective	p. 378
The very simple cipher which 'Snow', the first Double Cross agent, was given by his German controllers	p. 386
Wehrmacht Enigma Indicating Systems, except the Kriegsmarine's Kenngruppenbuch System	p. 389
The Naval Enigma Kenngruppenbuch Indicator System - used with the main wartime ciphers	p. 393
Cillies	p. 396
Enciphering by JN-25	p. 400
Recovery by Differencing	p. 402
Bayes, Hall's Weights and the Standardising of Judgements	p. 406
Notes and references	p. 410
Glossary and abbreviations	p. 471
Notes on Contributors	p. 480
Index
Table of Contents provided by Ingram. All Rights Reserved.

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