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。
Applying the modern cryptographical technology constructs two digital copyright protection schemes.
利用现代密码技术构造了两个数字版权保护方案。
The problem of digital copyright protection is taken into account by more and more people. Cryptographical technology is one of the key solutions to this problem.
数字版权保护问题越来越受到人们的重视，密码技术是解决这一问题的关键技术之一。
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