Breaking Teleprinter Ciphers at Bletchley Park – an edition of I. J. Good, D. Michie, and G. Timms, General Report on Tunny with emphasis on...

<p>Preface xiii</p>
<p>Editorial Notes xiv</p>
<p>Notes on Vocabulary xiv</p>
<p>List of Abbreviations xv</p>
<p>Cryptanalytic Significance of the Analysis of Tunny, by Whitfield Diffie xvii</p>
<p>Editors Introduction, by Whitfield Diffie and J. V. Field xxv</p>
<p>Statistics at Bletchley Park, by S. L. Zabell lxxv</p>
<p>Biographies of Authors ciii</p>
<p>Notes on the Editors of the Present Volume cvii</p>
<p>List of Figures cix</p>
<p>General Report on Tunny, with emphasis on statistical methods 1</p>
<p>Part 0: Preface</p>
<p>Chapter 01: Preface 3</p>
<p>Part 1: Introduction</p>
<p>Chapter 11: German Tunny 6</p>
<p>Chapter 12: Cryptographic Aspects 22</p>
<p>Chapter 13: Machines 32</p>
<p>Chapter 14: Organisation 35</p>
<p>Chapter 15: Some Historical Notes 39</p>
<p>Part 2: Methods of Solution</p>
<p>Chapter 21: Some Probability Techniques 43</p>
<p>Chapter 22: Statistical Foundations 50</p>
<p>Chapter 23: Machine Setting 80</p>
<p>Chapter 24: Rectangling 110</p>
<p>Chapter 25: Chi–Breaking from Cipher 139</p>
<p>Chapter 26: Wheel–Breaking from Key 185</p>
<p>Chapter 27: Cribs 219</p>
<p>Chapter 28: Language Methods 237</p>
<p>Part 3: Organisation</p>
<p>Chapter 31: Mr Newman s Section 262</p>
<p>Chapter 32: Organisation of the Testery 267</p>
<p>Chapter 33: Knockholt 268</p>
<p>Chapter 34: Registration and Circulation 269</p>
<p>Chapter 35: Tapemaking and Checking 271</p>
<p>Chapter 36: Chi–Breaking from Cipher 275</p>
<p>Chapter 37: Machine Setting Organisation 277</p>
<p>Chapter 38: Wheel–Breaking from Key, Organisation 280</p>
<p>Chapter 39: Language Methods 282</p>
<p>Part 4: Early Methods and History</p>
<p>Chapter 41: The First Break 284</p>
<p>Chapter 42: Early Hand Methods 290</p>
<p>Chapter 43: Testery Methods 1942 44 298</p>
<p>Chapter 44: Hand Statistical Methods 305</p>
<p>Part 5: Machines</p>
<p>Chapter 51: Introductory 309</p>
<p>Chapter 52: Development of Robinson and Colossus 312</p>
<p>Chapter 53: Colossus 316</p>
<p>Chapter 54: Robinson 336</p>
<p>Chapter 55: Specialized Counting Machines 346</p>
<p>Chapter 56: Copying Machines 350</p>
<p>Chapter 57: Simple machines 361</p>
<p>Chapter 58: Photographs 362</p>
<p>Part 6: Raw Materials</p>
<p>Chapter 61: Raw Materials Production, with Plans of Tunny Links 381</p>
<p>Part 7: References</p>
<p>Chapter 71: Glossary and Index 387</p>
<p>Chapter 72: Notation 435</p>
<p>Chapter 73: Bibliography 441</p>
<p>Chapter 74: Chronology 444</p>
<p>Part 8: Conclusions</p>
<p>Chapter 81: Conclusions 452</p>
<p>Part 9: Appendices</p>
<p>Chapter 91: The 5202 Machine 456</p>
<p>Chapter 92: Recovery of Motor Patterns from De–chi 471</p>
<p>Chapter 93: Thrasher 482</p>
<p>Chapter 94: Research into the QEP System 484</p>
<p>Chapter 95: Mechanical Flags 488</p>
<p>Appendix A: Transmission of Teleprinter Signals, by J. A. Reeds 495</p>
<p>Appendix B: Activities at Knockholt, by J. A. Reeds 503</p>
<p>Appendix C: The 5202 Machine, by J. A. Reeds 530</p>
<p>Appendix D: Initial Conception of Colossus, by J. A. Reeds 535</p>
<p>Appendix E: List of Scanned Exhibits 540</p>
<p>Supplementary Glossary 542</p>
<p>Biographical Notes 547</p>
<p>Notes 561</p>
<p>Bibliography 624</p>
<p>Index 645</p>