Cryptanalysis
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Cryptanalysis

3.8 (130 ratings by Goodreads)
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Description

Gaines's Cryptanalysis (formerly published as Elementary Cryptanalysis) is a standard elementary and intermediate text for persons seriously interested in modern science methods for enciphering and deciphering cryptograms. It does not simply repeat older material, but contains much about modern cryptanalysis that is not generally known except to experts. It is especially strong in modern forms of cipher solution.
This clear and thorough text also provides the reader with 166 specimen codes to solve. This edition for the first time also includes solutions. A special appendix includes final letters, sequence charts, digram, trigram tables, most common words in English and frequencies in English, German, French, Italian, Spanish, and Portuguese.
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Product details

  • Paperback | 230 pages
  • 136 x 214 x 14mm | 358.34g
  • New York, United States
  • English
  • Illustrations, unspecified
  • 0486200973
  • 9780486200972
  • 116,130

Table of contents

Preface
General Information
Concealment Devices
Transposition Types
Geometrical Types--The Nihilist Transposition
Geometrical Types--The Turning Grille
Irregular Types--Columnar Transposition
"General Methods--Multiple Anagramming, Etc."
Substitution Types
Simple Substitution--Fundamentals
The Consonant-Line Short Cut
  A Method for Attacking Difficult Cases (by George C. Lamb)
Simple Substitution with Complexities
Multiple-Alphabet Ciphers--The Vigenere
"The Gronsfeld, Porta, and Beaufort Ciphers"
The Kasiski Method for Periodic Ciphers
Miscellaneous Phases of Vigenere Decryptment
Auto-Encipherment
Some Periodic Number-Ciphers
Periodic Ciphers with Mixed Alphabets
Polyalphabetical Encipherment Applied by Groups
Vigenere with Key-Progression
Polygram Substitution--The Playfair Cipher
Highlights of Fractional Substitution
Investigating the Unknown Cipher
Appendix
  English Frequency and Sequence Data
  Comparative Table of Single-Letter Frequencies
  Chart Showing Normal Contact Percentages (by F.R. Carter)
  Chart Showing Frequencies of English Digrams (by O. Phelps Meaker)
  Some Foreign Language Data
  Bibliography (by W.D. Witt)
  The Commonest English Words (by Frank R. Fraprie)
  English Trigrams (by Frank R. Fraprie)
  English Digrams (by Frank R. Fraprie)
Solutions
Index
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Rating details

130 ratings
3.8 out of 5 stars
5 23% (30)
4 45% (58)
3 24% (31)
2 7% (9)
1 2% (2)
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