Military Cryptanalysis [Part 3] 0089412196
This book provides an excellent foundation for solving cipher systems. The text describes the fundamental principles of
306 81 101KB
English Pages 125 Year 1939
Table of contents :
MILITARY CRYPTANALYSIS Part IV......Page 0
INTRODUCTORY......Page 6
SOLUTION OF SYSTEMS USING CONSTANT-LENGTH KEYING UNITS TO ENCIPHER......Page 10
SOLUTION OF SYSTEMS USING CONSTANT-LENGTH KEYING UNITS TO ENCIPHER......Page 13
SOLUTION OF SYSTEMS USING CONSTANT-LENGTH KEYING UNITS TO ENCIPHER......Page 19
SOLUTION OF SYSTEMS USING VARIABLE-LENGTH KEYING UNITS TO ENCIPHER......Page 24
REVIEW OF AUTO-KEY SYSTEMS......Page 33
SOLUTION OF CIPHER-TEXT AUTO-KEY SYSTEMS......Page 35
SOLUTION OF PLAIN-TEXT AUTO-KEY SYSTEMS......Page 50
METHODS OF LENGTHENING OR EXTENDING THE KEY......Page 55
GENERAL PRINCIPLES UNDERLYING SOLUTION OF SYSTEMS EMPLOYING LONG......Page 58
THE “COINCIDENCE” OR “x” TEST......Page 63
THE “CROSS-PRODUCT SUM” OR “x TEST”’......Page 78
APPLYING THE CROSS-PRODUCT SUM OR x TEST......Page 84
THE “MONOALPHABETICITY” OR “+ TEST”......Page 99
CONCLUDING REMARKS......Page 102
APPENDIX 1......Page 103
INDEX......Page 122
’ Analytical Key for Military Cryptanalysis, Part IlI......Page 124
BOOKS IN THE CRYPTOGRAPHIC SERIES......Page 125
MILITARY CRYPTANALYSIS Part IV......Page 0
INTRODUCTORY......Page 6
SOLUTION OF SYSTEMS USING CONSTANT-LENGTH KEYING UNITS TO ENCIPHER......Page 10
SOLUTION OF SYSTEMS USING CONSTANT-LENGTH KEYING UNITS TO ENCIPHER......Page 13
SOLUTION OF SYSTEMS USING CONSTANT-LENGTH KEYING UNITS TO ENCIPHER......Page 19
SOLUTION OF SYSTEMS USING VARIABLE-LENGTH KEYING UNITS TO ENCIPHER......Page 24
REVIEW OF AUTO-KEY SYSTEMS......Page 33
SOLUTION OF CIPHER-TEXT AUTO-KEY SYSTEMS......Page 35
SOLUTION OF PLAIN-TEXT AUTO-KEY SYSTEMS......Page 50
METHODS OF LENGTHENING OR EXTENDING THE KEY......Page 55
GENERAL PRINCIPLES UNDERLYING SOLUTION OF SYSTEMS EMPLOYING LONG......Page 58
THE “COINCIDENCE” OR “x” TEST......Page 63
THE “CROSS-PRODUCT SUM” OR “x TEST”’......Page 78
APPLYING THE CROSS-PRODUCT SUM OR x TEST......Page 84
THE “MONOALPHABETICITY” OR “+ TEST”......Page 99
CONCLUDING REMARKS......Page 102
APPENDIX 1......Page 103
INDEX......Page 122
’ Analytical Key for Military Cryptanalysis, Part IlI......Page 124
BOOKS IN THE CRYPTOGRAPHIC SERIES......Page 125
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