In this paper we introduce and develop a framework for visual data-hiding technologies that aim at resolving emerging problems of modern multimedia networking. First, we present the main open issues of multimedia security and secure communications. Secondly, we formulate multimedia data-hiding as communications with side information and advocate an appropriate information-theoretic framework for the analysis of different data-hiding methods in various applications. Finally, we discuss data-hiding-based solutions to some multimedia security related problems.
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