Unravelling Enigma

Front Cover
Pen and Sword, Mar 15, 2001 - History - 224 pages
Seldom out of the news for long, code-breaking has had a bad time in the media so far, readers and viewers often finding it as perplexing as it is intriguing. As one of the greatest achievements of the century, code- breaking is a fascinating story, but all too often misunderstood and felt to be obscure. The author covers the story from the early code-breaking efforts through the rickety structure of the pre-war Government Code and Cypher School to Bletchley Park where a large powerful organisation arose, unscrambling thousands of secret enemy messages every day. Detailing how these amazing discoveries were actually used, taking us briefly into some of the battles of the Second World War, and in some detail the Battle of the Atlantic, when Britain was in danger of starving and where the war was nearly lost.For the first time, the code-breaking story with all its complexities is told in a straightforward and readable manner, whilst at the same time it will not fail to intrigue and astonish readers.
 

Contents

Introduction
1
1 Gentlemen Do Not Read Each Others Mail
7
2 The Polish Enigma
15
3 The Impossible We Do Immediately Success and Expansion at Bletchley Park
25
4 Hut Six Where It All Began
34
5 Guessing with Virtual Certainty The TuringWelchman Bombe
44
6 Hut Three Getting to Know the Enemy
51
7 Huts Four and Eight Searching for UBoats
64
12 Defeat for the UBoats
125
13 Colossus and Tunny The Big Fish Miracles Take a Little Longer
139
14 1944 The Invasion of Europe Allied Deception Plans
152
Tailpiece
162
Appendix 1 The Code wheel
169
Appendix 2 Operating the Enigma Machine Military and Air Force from 15 September 1938 until May 1940
173
Appendix 3 Setting up the Naval Enigma Machine
176
Appendix 4 Bletchley in Danger
178

8 How Not to Keep a Secret
75
9 Greece and Crete The CodeBreakers Lend a Hand
80
10 North Africa Ultra Triumphant
89
11 The Atlantic Where the War Was Nearly Lost
97
Appendix 5 Enigma and SZ 4042 Tunny
182
Bibliography
185
Index
187
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