Cryptanalysis a Study of Ciphers and Their Solutions - Brossura

Gaines, H. F.

Brossura

ISBN 10: 0486200973 ISBN 13: 9780486200972

Casa editrice: Dover Pubns, 1956

Riassunto

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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Contenuti:

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

Product Description:

Book by Gaines Helen F

Su questa edizione

• Editore: Dover Pubns
• Data di pubblicazione: 1956
• ISBN 10: 0486200973
• ISBN 13: 9780486200972
• Rilegatura: Copertina flessibile
• Numero di pagine: 230