Military Cryptanalysis

Friedman W.F.0089412044

This book provides an excellent foundation for solving cipher systems. The text describes the fundamental principles of cipher solution plus use of the unilateral frequency distribution in the solution process is covered in some detail. Various unilateral and multilateral systems are carefully discussed. In addition, the text introduces the student to the solution of digraphic substitution ciphers, including the solution of the Playfair Cipher. Numerous problems are provided for solution by the student.

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Table of contents :
MILITARY CRYPTANALYSIS Part IV……Page 0
With New Added Problems For The Student……Page 1
FOREWORD……Page 4
MILITARY CRYPTANALYSIS, PART I. MONOALPHABETIC SUBSTITUTION SYSTEMS……Page 5
INTRODUCTORY REMARKS……Page 6
FUNDAMENTAL PRINCIPLES……Page 12
FREQUENCY DISTBIBUTIONS……Page 16
FUNDAMENTAL USES OF THE UNILITERAL FREQUENCY DISTRIBUTION……Page 23
UNILITERAL SUBSTITUTION WITH STANDARD CIPHER ALPHABETS……Page 32
UNILITERAL SUBSTITUTION WITH MIXED CIPHER ALPHABETS……Page 45
MULTILITERAL SUBSTITUTION WITH SINGLE-EQUIVALENT CIPHER ALPHARETS……Page 64
MULTHJTEUL SUBSTITUTION WITH MULTIPLE-EQUIVALENT CIPHER……Page 68
POLYGRAPHIC SUBSTITUTION SYSTEMS……Page 75
CONCLUDING REMARKS……Page 104
APPENDIX I……Page 110
INDEX……Page 141
PROBLEMS……Page 147
BOOKS IN TEH CRYPTOGRAPHIC SERIES……Page 154