P.D. ...One year after purchase, I keep opening this book All in all just a fascinating book on a fascinating topic. In general, the introductory parts of each chapter are accessible to anyone with a standard 12 year education. The mathematics are best understood by people with a background in algebra and statistics at the American High School level, but not much more. If you buy this book, expect John Ashcroft to put your name on a list of people buying dangerous published works (and with the Patriot Act in place, I am neither paranoid nor joking). The best chapter is the one about encoding information in ordered lists. This book taught me how to include a one line hidden message in a 50 item list of my favorite Country and Western Songs of all time (and THAT is a cool thing to do).
A great place to start!...reviews: page 1, 2Disappearing Cryptography, Second Edition describes how to take words, sounds, or images and hide them in digital data so they look like other words, sounds, or images. When used properly, this powerful technique makes it almost impossible to trace the author and the recipient of a message. Conversations can be submerged in the flow of information through the Internet so that no one can know if a conversation exists at all.This full revision of the best-selling first edition describes a number of different techniques to hide information. These include encryption, making data incomprehensible; steganography, embedding information into video, audio, or graphics files; watermarking, hiding data in the noise of image or sound files; mimicry, "dressing up" data and making it appear to be other data, and more. The second edition also includes an expanded discussion on hiding information with spread-spectrum algorithms, shuffling tricks, and synthetic worlds. Each chapter is divided into sections, first providing an introduction and high-level summary for those who want to understand the concepts without wading through technical explanations, and then presenting greater detail for those who want to write their own programs. To encourage exploration, the author's Web site www.wayner.org/books/discrypt2/ contains implementations for hiding information in lists, sentences, and images. Each chapter is divided into sections, providing first an introduction and high-level summary for those who want to understand the concepts without wading through technical details, and then an introductory set of details, for those who want to write their own programs. Fully revised and expanded. Covers key concepts for non-technical readers. Goes into technical details for those wanting to create their own programs and implement algorithms. Up-to-date website containing the code samples from the book.