Information hiding is a technology which embeds the important data into digital video, audio or picture to hide the existence for anonymous communications.

信息隐藏是一种将有用的或重要的信息隐藏于视频、音频或图像等当中以掩饰其存在，实现隐蔽通信或隐蔽标识的技术。

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In this dissertation, some algorithms of data hiding based on the digital image, text and audio are developed from the practical points of view.

本文从工程实用的角度出发，研究了在图象、文本和音频中信息隐藏的技术。

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