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The theoretical and practical foundations of multimedia data processing using computer steganography, as well as methods of steganographic analysis of graphic content of information and communication systems are considered. The features of using the universal mathematical system Mathcad for the purposes of steganographic data processing are clearly shown.

Examples of practical implementation of data hiding in static images, audio signals and text are presented.

The problems of reliability and stability of an arbitrary steganographic system in relation to various types of attacks, as well as estimation of the channel capacity of covert data exchange are systematically presented.

The results of information and practical research of the problem of steganographic analysis of digital images are presented.