Until recently, information hiding techniques received very much less
attention from the research community and from industry than cryptography.
This situation is, however, changing rapidly and the first academic
conference on this topic was organized in 1996. The main driving force is
concern over protecting copyright; as audio, video and other works become
available in digital form, the ease with which perfect copies can be made
may lead to large-scale unauthorized copying, and this is of great concern
to the music, film, book and software publishing industries. At the same
time, moves by various governments to restrict the availability of
encryption services have motivated people to study methods by which private
messages can be embedded in seemingly innocuous cover messages.
This book surveys recent research results in the fields of watermarking
and steganography, two disciplines generally referred to as information
hiding. Included are chapters about the following topics:
Chapter 1: Introduction to information
hiding(Fabien A. P. Petitcolas) gives an introduction
to the field of information hiding, thereby discussing the history of
steganography and watermarking and possible applications to modern
Chapter 2: Principles of steganography(Stefan Katzenbeisser) introduces a model for steganographic
communication (the ‘prisoners problem") and discusses various
steganographic protocols (such as pure steganography, secret key
steganography, public key steganography and supraliminal channels).
Chapter 3: A survey of steganographic
techniques(Neil F. Johnson and Stefan Katzenbeisser)
discusses several information hiding methods useable for steganographic
communication, among them substitution systems, hiding methods in
two-colour images, transform domain techniques, statistical
steganography, distortion and cover generation techniques.
Chapter 4: Steganalysis(Neil
F. Johnson) introduces the concepts of steganalysis – the task of
detecting and possibly removing steganographic information. Included is
also an analysis of common steganographic tools.
Chapter 5: Introduction to watermarking
techniques(Martin Kutter and Frank Hartung) introduces
the requirements and design issues for watermarking software. The authors
also present possible applications for watermarks and discuss methods for
evaluating watermarking systems.
Chapter 6: A survey of current watermarking
techniques(Jean-Luc Dugelay and Stéphane Roche)
presents several design principles for watermarking systems, among them
the choice of host locations, psychovisual aspects, the choice of a
workspace (DFT, DCT, wavelet), the format of the watermark bits (spread
spectrum, low-frequency watermark design), the watermark insertion
operator and optimizations of the watermark receiver.
Chapter 7: Robustness of copyright marking
systems(Scott Craver, Adrian Perrig and Fabien A. P.
Petitcolas) discusses the crucial issue of watermark robustness to
intentional attacks. The chapter includes a taxonomy of possible attacks
against watermarking systems, among them protocol attacks like inversion,
oracle attacks, limitations of WWW spiders and system architecture
Chapter 8: Fingerprinting
(Jong-Hyeon Lee) discusses principles and applications of
fingerprinting to the traitor tracing problem, among them statistical
fingerprinting, asymmetric fingerprinting and anonymous fingerprinting.
Chapter 9: Copyright on the Internet and
watermarking(Stanley Lai and Fabrizio Marongiu Buonaiuti)
finally discusses watermarking systems from a legal point of view and
addresses various other aspects of copyright law on the Internet.