Digital watermarking technique is an important research field of multimedia information security.

数字水印技术是多媒体信息安全领域的一个重要研究课题。

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In this dissertation, we study the technologies and application of multimedia information security in the area of digital watermarking.

本论文主要探讨有关数字图像信息安全的数字水印技术。

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As a branch of multimedia information security technology, digital image authentication is paid close attention by one of a growing number of experts.

数字图像认证技术作为多媒体信息安全技术的分支之一，受到了越来越多专家学者的重视。

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For people less familiar with online shopping, the package includes a multimedia tutorial from U.S. Robotics with information on how to buy online and on various security issues.

CNN: 3Com modems target games, shopping