Introduzione completa e sistematica alla crittografia seria, particolarmente valida nelle forme moderne di soluzione di cifratura utilizzate dagli esperti. Nichilista, griglia, esercito degli Stati Uniti, frase chiave, alfabeto multiplo, Gronsfeld, Porta, Beaufort, cifrari periodici e altro. Metodi semplici e avanzati. 166 campioni da risolvere ― con soluzioni.
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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
Book by Gaines Helen F
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Da: Austin Goodwill 1101, Austin, TX, U.S.A.
Condizione: good. Book shows general signs of use and handling. May have light wear on the cover or edges and minimal writing or highlighting. Binding remains tight, and pages are clean and readable. Codice articolo CTXV.0486200973.G
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Da: World of Books (was SecondSale), Montgomery, IL, U.S.A.
Paperback. Condizione: Very Good. Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Simple and advanced methods. 166 specimens to solve with solutions. Codice articolo 00109410730
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Da: World of Books (was SecondSale), Montgomery, IL, U.S.A.
Paperback. Condizione: Good. Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Simple and advanced methods. 166 specimens to solve with solutions. Codice articolo 00109202235
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Da: BooksRun, Philadelphia, PA, U.S.A.
Paperback. Condizione: Very Good. It's a well-cared-for item that has seen limited use. The item may show minor signs of wear. All the text is legible, with all pages included. It may have slight markings and/or highlighting. Codice articolo 0486200973-11-6
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Da: ThriftBooks-Atlanta, AUSTELL, GA, U.S.A.
Paperback. Condizione: Very Good. No Jacket. May have limited writing in cover pages. Pages are unmarked. ~ ThriftBooks: Read More, Spend Less. Codice articolo G0486200973I4N00
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