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On Noise, Steganography, and the Active Warden
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Author(s): Christopher B. Smith (Southwest Research Institute, USA)and Sos S. Agaian (The University of Texas at San Antonio, USA)
Copyright: 2009
Pages: 24
Source title:
Multimedia Forensics and Security
Source Author(s)/Editor(s): Chang-Tsun Li (University of Warwick, UK)
DOI: 10.4018/978-1-59904-869-7.ch008
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Abstract
Modern digital steganography has evolved a number of techniques to embed information near invisibly into digital media. Many of the techniques for information hiding result in a set of changes to the cover image that appear, for all intents and purposes to be noise. This chapter presents information for the reader to understand how noise is intentionally and unintentionally used in information hiding. This chapter first reviews a series of noise-like steganography methods. From these techniques the problems faced by the active warden can be posed in a systematic way. Results of using advanced clean image estimation techniques for active warden based steganalysis are presented. This chapter is concluded with a discussion of the future of steganography.
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