On base of analysis of watermarking attacks on digital images, the paper presents a digital image copyright protection protocol based on digital watermarking technology.

在分析数字图像中数字水印所受各种攻击的基础上，给出了一个基于数字水印技术的数字图像版权保护安全协议框架。

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The watermarking technique robust to both signal processing attacks and geometrical attacks is one of the hotspots and difficulties in the digital watermarking research.

能有效抵抗信号处理又能抵抗几何攻击是当今数字水印研究的热点和难点之一，提出一种能够抵抗信号处理、旋转、缩放和平移的鲁棒视频水印。

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In this paper, the basic concepts, frame of the system, main categories of digital watermarking and possible attacks are described.

本文介绍数字水印技术的基本概念、系统框架、主要分类及可能的攻击方法。

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