Elementary cryptanalysis 2nd Edition by Abraham Sinkov, Todd Feil ISBN 978-0883856475 0883856476

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Product details: 

ISBN 10:  0883856476

ISBN 13: 978-0883856475

Author: Abraham Sinkov,  Todd Feil

Most people, acquainted with cryptology either through sensational cloak and dagger stories or through newspaper cryptograms, are not aware that many aspects of this art may be treated systematically, by means of some elementary mathematical concepts and methods. In this introduction, Professor Sinkov explains some of the fundamental techniques at the heart of cryptanalytic endeavor from which much more sophisticated techniques have evolved, especially since the advent of computers. The mathematical topics relevant in these discussions include modular arithmetic, a little number theory, some linear algebra of two dimensions with matrices, some combinatorics, and a little statistics. This second edition has been revised and updated by Todd Fiel, and now includes discussion of the RSA method.

Table of contents: 

1 Monoalphabetic Ciphers Using Additive Alphabets

1.1 The Caesar Cipher.

1.2 Modular arithmetic

1.3 Additive alphabets

1.4 Solution of additive alphabets

1.5 Frequency considerations

1.6 Multiplications

1.7 Solution of multiplicative alphabets

1.8 Affine ciphers

2 General Monoalphabetic Substitution

2.1 Mixed alphabets

2.2 Solution of mixed alphabet ciphers

2.3 Solution of five-letter groupings

2.4 Monoalphabets with symbols

3 Polyalphabetic Substitution

3.1 Polyalphabetic ciphers

3.2 Recognition of polyalphabetic ciphers

3.3 Determination of number of alphabets

3.4 Solutions of additive subalphabets

3.5 Mixed plain sequences

3.6 Matching alphabets

3.7 Reduction to a monoalphabet

3.8 Mixed cipher sequences

3.9 General comments

4 Polygraphic Systems

4.1 Linear Transformations

4.2 Multiplication of matrices-inverses

4.3 Involutory transformations

4.4 Recognition of digraphic ciphers

4.5 Solution of a linear transformation

4.6 How to make the Hill System more secure

5 Transposition

5.1 Columnar transposition

5.2 Completely filled rectangles

5.3 Incompletely filled rectangles

5.4 Probable word method

5.5 General case

5.6 Identical length messages

6 RSA Encryption

6.1 Public-key encryption

6.2 The RSA method

6.3 Creating the RSA keys

6.4 Why RSA works-Fermat’s Little Theorem

6.5 Computational considerations

6.6 Maple and Mathematica for RSA

6.7 Breaking RSA and signatures

7 Perfect Security-One-time Pads

7.1 One-time pads

7.2 Pseudo-random number generators

Appendix A: Tables

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Tags: Abraham Sinkov, Todd Feil, Elementary cryptanalysis