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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This paper introduces how to use DCT (discrete-cosine transform) in data-hiding technology in image, and its fundamental theory and algorithms, special improvements of existing algorithms.

该文主要介绍了如何利用离散余弦变换(DCT)实现对于图象文件的数据隐藏技术，详细说明了该技术的基本原理和实现方法，以及对现有算法的改进。

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The United States army has expressed an interest in the data-hiding algorithms for combining extremely high-resolution reconnaissance photographs with authentication security.

ECONOMIST: MONITOR