# Elementary Cryptanalysis: A Mathematical Approach

### By Abraham Sinkov, Revised and Updated by Todd Feil

2nd Edition
Catalog Code: NML-22E2
Print ISBN: 978-0-88385-647-5
Electronic ISBN: 978-0-88385-937-7
232 pp., Hardbound, 2009
List Price: $58.95 MAA Member:$47.50
Series: MAA Textbooks

The revised and updated version of Elementary Cryptanalysis, originally published in the New Mathematical Library almost half a century ago, explains how to solve cryptograms based on elementary mathematical principles, starting with Caesar cipher and building up to progressively more sophisticated substitution methods. Todd Feil has updated the book for the technological age by adding two new chapters covering RSA public-key cryptography, one-time pads, and pseudo-random-number generators.

Exercises are given throughout the text that will help the reader understand the concepts and practice the techniques presented. The book assumes minimal mathematical prerequisites and therefore explains from scratch such concepts as summation notation, matrix multiplication, and modular arithmetic.

Preface to the First Edition
Preface to the Second Edition
1. Monoalphabetic Ciphers Using Additive Alphabets
2. General Monoalphabetic Substitution
3. Polyalphabetic Substitution
4. Polygraphic Systems
5. Transposition
6. RSA Encryption
Appendix A: Tables
Appendix B: ASCII Codes
Appendix C: Binary Codes
Solutions to Exercises
Index