Cryptanalysis (Paperback)

Helen F. Gaines

  • 出版商: Dover Publications
  • 出版日期: 1989-04-01
  • 售價: $634
  • 貴賓價: 9.5$602
  • 語言: 英文
  • 頁數: 256
  • 裝訂: Paperback
  • ISBN: 0486200973
  • ISBN-13: 9780486200972

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商品描述

Description

Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Nihilist, grille, U. S. Army, key-phrase, multiple-alphabet, Gronsfeld, Porta, Beaufort, periodic ciphers and more. Simple and advanced methods. 166 specimens to solve—with solutions.

 

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