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Disappearing Cryptography, Second Edition - Information Hiding: Steganography and Watermarking

   
지은이 Peter Wayner   |   출판사 Morgan Kaufmann  |   발행일 2003년 08월 28일   |   언어 : English
 
판매가 88,100원68,700원 22%
마일리지 0% 0원
발행일 2003-08-28 | 중량: 0.01 kg | 사이즈: 0.2*0.2*0 cm
ISBN 1558607692 | 9781558607699
기타정보 원서 | 413쪽 | $ 62.95
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Disappearing 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.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.
Preface
1 Framing Information 1
Reasons for Secrecy 3
How It Is Done 5
How Steganography Is Used 7
Attacks on Steganography 9
Adding Context 13

2 Encryption 15
Encryption and White Noise 16
Measuring Information and Encrypting It 27

3 Error Correction 33
Correcting Errors 33
Constructing Error-Correcting Codes 42

4 Secret Sharing 49
Splitting Up Secrets 50
Building Secret-Sharing Schemes 57
Public-Key Secret Sharing 60
Steganographic File Systems and Secret Sharing 61

5 Compression 67
Patterns and Compression 68
Building Compression Algorithms 74

6 Basic Mimicry 81
Running in Reverse 82
Implementing the Mimicry 89

7 Grammars and Mimicry 97
Using Grammar for Mimicry 99
Creating Grammar-Based Mimicry 107

8 Turing and Reverse 129
Running Backward 130
Building a Reversible Machine 139

9 Life in the Noise 149
Hiding in the Noise 151
Bit Twiddling 161

10 Anonymous Remailers 183
Anonymous Remailers 185
Remailer Guts 191
Anonymous Networks 198
The Future 203

11 Secret Broadcasts 205
Secret Senders 206
Creating a DC Net 210

12 Keys 215
Extending Control 216
Signing Algorithms 218
Public-Key Algorithms 220
Zero-Knowledge Approaches 226
Collusion Control 232

13 Ordering and Reordering 235
Strength against Scrambling 237
Invariant Forms 239
Canonical Forms 240
Packing in Multiple Messages 241
Sorting to Hide Information 241
Adding Extra Packets 244

14 Spreading 247
Spreading the Information 249
Going Digital 252
Comparative Blocks 260
Fast Fourier Solutions 262
The Fast Fourier Transform 265
Hiding Information with FFTs and DCTs 270
Wavelets 275
Modifications 278

15 Synthetic Worlds 281
Created Worlds 282
Text Position Encoding and OCR 284
Echo Hiding 287

16 Watermarks 291
Embedding Ownerships Information 292
A Basic Watermark 297
An Averaging Watermark 300

17 Steganalysis 303
Finding Hidden Messages 303
Typical Approaches 305
Visual Attacks 306
Structural Attacks 309
Statistical Attacks 311
Afterword 315

App. A Java Mimic Code 319
App. B Baseball CFG 353
App. C Reversible Grammar Generator 367
App. D Software 379
Further Readings 383
Bibliography 387
Index 401
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