{"product_id":"breaking-teleprinter-ciphers-at-bletchley-park-isbn-9780470465899","title":"Breaking Teleprinter Ciphers at Bletchley Park","description":"This book is an edition of the \u003ci\u003eGeneral Report on Tunny\u003c\/i\u003e with commentary that clarifies the often difficult language of the GRT and fitting it into a variety of contexts arising out of several separate but intersecting story lines, some only implicit in the GRT. \u003cbr\u003e \u003cul\u003e \u003cli\u003eExplores the likely roots of the ideas entering into the Tunny cryptanalysis\u003c\/li\u003e \u003cli\u003eIncludes examples of original worksheets, and printouts of the Tunny-breaking process in action\u003c\/li\u003e \u003cli\u003ePresents additional commentary, biographies, glossaries, essays, and bibliographies\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003ePreface xiii\u003c\/p\u003e \u003cp\u003eEditorial Notes xiv\u003c\/p\u003e \u003cp\u003eNotes on Vocabulary xiv\u003c\/p\u003e \u003cp\u003eList of Abbreviations xv\u003c\/p\u003e \u003cp\u003eCryptanalytic Significance of the Analysis of Tunny, by Whitfield Diffie xvii\u003c\/p\u003e \u003cp\u003eEditors’ Introduction, by Whitfield Diffie and J. V. Field xxv\u003c\/p\u003e \u003cp\u003eStatistics at Bletchley Park, by S. L. Zabell lxxv\u003c\/p\u003e \u003cp\u003eBiographies of Authors ciii\u003c\/p\u003e \u003cp\u003eNotes on the Editors of the Present Volume cvii\u003c\/p\u003e \u003cp\u003eList of Figures cix\u003c\/p\u003e \u003cp\u003eGeneral Report on Tunny, with emphasis on statistical methods 1\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 0: Preface\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 01: Preface 3\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 1: Introduction\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 11: German Tunny 6\u003c\/p\u003e \u003cp\u003eChapter 12: Cryptographic Aspects 22\u003c\/p\u003e \u003cp\u003eChapter 13: Machines 32\u003c\/p\u003e \u003cp\u003eChapter 14: Organisation 35\u003c\/p\u003e \u003cp\u003eChapter 15: Some Historical Notes 39\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 2: Methods of Solution\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 21: Some Probability Techniques 43\u003c\/p\u003e \u003cp\u003eChapter 22: Statistical Foundations 50\u003c\/p\u003e \u003cp\u003eChapter 23: Machine Setting 80\u003c\/p\u003e \u003cp\u003eChapter 24: Rectangling 110\u003c\/p\u003e \u003cp\u003eChapter 25: Chi-Breaking from Cipher 139\u003c\/p\u003e \u003cp\u003eChapter 26: Wheel-Breaking from Key 185\u003c\/p\u003e \u003cp\u003eChapter 27: Cribs 219\u003c\/p\u003e \u003cp\u003eChapter 28: Language Methods 237\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 3: Organisation\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 31: Mr Newman’s Section 262\u003c\/p\u003e \u003cp\u003eChapter 32: Organisation of the Testery 267\u003c\/p\u003e \u003cp\u003eChapter 33: Knockholt 268\u003c\/p\u003e \u003cp\u003eChapter 34: Registration and Circulation 269\u003c\/p\u003e \u003cp\u003eChapter 35: Tapemaking and Checking 271\u003c\/p\u003e \u003cp\u003eChapter 36: Chi-Breaking from Cipher 275\u003c\/p\u003e \u003cp\u003eChapter 37: Machine Setting Organisation 277\u003c\/p\u003e \u003cp\u003eChapter 38: Wheel-Breaking from Key, Organisation 280\u003c\/p\u003e \u003cp\u003eChapter 39: Language Methods 282\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 4: Early Methods and History\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 41: The First Break 284\u003c\/p\u003e \u003cp\u003eChapter 42: Early Hand Methods 290\u003c\/p\u003e \u003cp\u003eChapter 43: Testery Methods 1942–44 298\u003c\/p\u003e \u003cp\u003eChapter 44: Hand Statistical Methods 305\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 5: Machines\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 51: Introductory 309\u003c\/p\u003e \u003cp\u003eChapter 52: Development of Robinson and Colossus 312\u003c\/p\u003e \u003cp\u003eChapter 53: Colossus 316\u003c\/p\u003e \u003cp\u003eChapter 54: Robinson 336\u003c\/p\u003e \u003cp\u003eChapter 55: Specialized Counting Machines 346\u003c\/p\u003e \u003cp\u003eChapter 56: Copying Machines 350\u003c\/p\u003e \u003cp\u003eChapter 57: Simple machines 361\u003c\/p\u003e \u003cp\u003eChapter 58: Photographs 362\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 6: Raw Materials\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 61: Raw Materials — Production, with Plans of Tunny Links 381\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 7: References\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 71: Glossary and Index 387\u003c\/p\u003e \u003cp\u003eChapter 72: Notation 435\u003c\/p\u003e \u003cp\u003eChapter 73: Bibliography 441\u003c\/p\u003e \u003cp\u003eChapter 74: Chronology 444\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 8: Conclusions\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 81: Conclusions 452\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePart 9: Appendices\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChapter 91: The 5202 Machine 456\u003c\/p\u003e \u003cp\u003eChapter 92: Recovery of Motor Patterns from De-chi 471\u003c\/p\u003e \u003cp\u003eChapter 93: Thrasher 482\u003c\/p\u003e \u003cp\u003eChapter 94: Research into the QEP System 484\u003c\/p\u003e \u003cp\u003eChapter 95: Mechanical Flags 488\u003c\/p\u003e \u003cp\u003eAppendix A: Transmission of Teleprinter Signals, by J. A. Reeds 495\u003c\/p\u003e \u003cp\u003eAppendix B: Activities at Knockholt, by J. A. Reeds 503\u003c\/p\u003e \u003cp\u003eAppendix C: The 5202 Machine, by J. A. Reeds 530\u003c\/p\u003e \u003cp\u003eAppendix D: Initial Conception of Colossus, by J. A. Reeds 535\u003c\/p\u003e \u003cp\u003eAppendix E: List of Scanned Exhibits 540\u003c\/p\u003e \u003cp\u003eSupplementary Glossary 542\u003c\/p\u003e \u003cp\u003eBiographical Notes 547\u003c\/p\u003e \u003cp\u003eNotes 561\u003c\/p\u003e \u003cp\u003eBibliography 624\u003c\/p\u003e \u003cp\u003eIndex 645\u003c\/p\u003e \u003cp\u003e\u003cb\u003eJames A. Reeds\u003c\/b\u003e is an applied mathematician and is currently on the research staff at the Center for Communications Research, Princeton, NJ.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eWhitfield Diffie\u003c\/b\u003e is best known for his 1975 discovery of the concept of public key cryptography. Since 1993, he has worked largely on public policy aspects of cryptography. His position in opposition to limitations on the business and personal use of cryptography has been the subject of articles in the \u003ci\u003eNew York Times\u003c\/i\u003e and programs on networks such as CNN.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eJ.V. Field\u003c\/b\u003e, an Honorary Visiting Research Fellow in the Department of History of Art at Birkbeck, University of London, is now a historian of science but in the 1960s worked as a computer programmer.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eThis detailed technical account of breaking Tunny is an edition of a report written in 1945, with extensive modern commentary\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003ci\u003eBreaking Teleprinter Ciphers at Bletchley Park \u003c\/i\u003egives the full text of the\u003ci\u003e General Report on Tunny\u003c\/i\u003e (GRT) of 1945, making clear how the ideas, notation and the specially designed machines that were used differ from what was generally accepted in 1945, and, where a modern reader might be misled, from what is understood now. The editors of this book clarify the sometimes slightly strange language of the GRT and explain the text within a variety of contexts in several separate historical story lines, some only implicit in the GRT itself.\u003c\/p\u003e \u003cp\u003eThe first story, told by the authors of the GRT, describes how, using specially designed machines, including from 1944 the \"Colossus\", the British broke the enciphered teleprinter messages sent by the highest command levels of the Germany Army. The cipher machines the Germans used were the Lorenz SZ 40 series, called \"Tunny\" by the British. The second story shows how the use of then-unfashionable Bayesian methods in statistics proved to be essential to the British success. The third story describes a significant stage in the invention of the modern digital computer. This story is connected with Alan Turing's 1936 paper on the theory of computability, which is nowadays seen as a starting point for the development of the modern digital computer.\u003c\/p\u003e \u003cp\u003eThis book includes:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eOver 200 pages of commentary, biographies, glossaries, and essays related to the text of the \u003ci\u003eGeneral Report on Tunny\u003c\/i\u003e\n\u003c\/li\u003e \u003cli\u003eThe complete text of the original GRT, covering the general theory of Tunny breaking and of numerous refinements appropriate to special-case situations\u003c\/li\u003e \u003cli\u003eAll the examples of original worksheets and printouts, showing the Tunny-breaking process in action, that appear in the GRT\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThe main purpose of this book is to present the actual words of the GRT for use by readers with a serious interest in the history of cryptography, computing, or mathematics.\u003c\/p\u003e","brand":"Wiley-IEEE Press","offers":[{"title":"Default Title","offer_id":47988855996645,"sku":"NP9780470465899","price":156.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1842\/7735\/files\/9780470465899.jpg?v=1761781793","url":"https:\/\/k12savings.com\/es\/products\/breaking-teleprinter-ciphers-at-bletchley-park-isbn-9780470465899","provider":"K12savings","version":"1.0","type":"link"}