Cryptanalysis: A Study of Ciphers and Their Solution

✍ Scribed by Gaines, Helen F

• Publisher: Dover Publications
• Year: 2014
• Tongue: English
• Category: Library

✦ Synopsis

Cover; Title; Copyright; Dedication; PREFACE; Contents; I. GENERAL INFORMATION; II. CONCEALMENT DEVICES; III. TRANSPOSITION TYPES; IV. GEOMETRICAL TYPES- THE NIHILIST TRANSPOSITION; V. GEOMETRICAL TYPES- THE TURNING GRILLE; VI. IRREGULAR TYPES- COLUMNAR TRANSPOSITION .; VII. GENERAL METHODS- MULTIPLE ANAGRAMMING, ETC; VIII. SUBSTITUTION TYPES; IX. SIMPLE SUBSTITUTION- FUNDAMENTALS; X. THE CONSONANT-LINE SHORT CUT; A METHOD FOR ATTACKING DIFFICULT CASES (BY GEORGE C. LAMB); XI. SIMPLE SUBSTITUTION WITH COMPLEXITIES; XII. MULTIPLE-ALPHABET CIPHERS- THE VIGENèRE.;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

Cover
Title
Copyright
Dedication
PREFACE
Contents
I. GENERAL INFORMATION
II. CONCEALMENT DEVICES
III. TRANSPOSITION TYPES
IV. GEOMETRICAL TYPES- THE NIHILIST TRANSPOSITION
V. GEOMETRICAL TYPES- THE TURNING GRILLE
VI. IRREGULAR TYPES- COLUMNAR TRANSPOSITION .
VII. GENERAL METHODS- MULTIPLE ANAGRAMMING, ETC
VIII. SUBSTITUTION TYPES
IX. SIMPLE SUBSTITUTION- FUNDAMENTALS
X. THE CONSONANT-LINE SHORT CUT
A METHOD FOR ATTACKING DIFFICULT CASES (BY GEORGE C. LAMB)
XI. SIMPLE SUBSTITUTION WITH COMPLEXITIES
XII. MULTIPLE-ALPHABET CIPHERS- THE VIGENèRE. XIII. THE GRONSFELD, PORTA, AND BEAUFORT CIPHERSXIV. THE KASISKI METHOD FOR PERIODIC CIPHERS
XV. MISCELLANEOUS PHASES OF VIGENèRE DECRYPTMENT
XVI. AUTO-ENCIPHERMENT
XVII. SOME PERIODIC NUMBER-CIPHERS
XVIII. PERIODIC CIPHERS WITH MIXED ALPHABETS
XIX. POLYALPHABETICAL ENCIPHERMENT APPLIED BY GROUPS
XX. VIGENÈRE WITH KEY-PROGRESSION
XXI. POLYGRAM SUBSTITUTION- THE PLAYFAIR CIPHER.
XXII. HIGHLIGHTS OF FRACTIONAL SUBSTITUTION
XXIII. 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.

✦ Subjects

Ciphers;Cryptography;GAMES & ACTIVITIES / Puzzles;Electronic books