人们借助于计算机、数字扫描仪、打印机等电子设备可以方便、迅速地将数字信息传输到所期望的地方。随之而来的副作用是这些数字形式的数据文件或作品使有恶意的个人和团体有可能在没有得到作品所有者的许可下拷贝和传播有版权的内容。由于传统的密码技术无法完全解决版权保护的问题，近年来国际上提出了一种新型的版权保护技术——数字水印技术。(With the aid of computers, digital scanners, printers and other electronic devices, digital information can be easily and quickly transmitted to the desired place. The consequent side effect is that these digital forms of data, documents, or works make malicious individuals and groups likely to copy and disseminate copyrighted content without permission from the works owner. Because the traditional cryptography can not completely solve the copyright protection problem, in recent years, a new type of copyright protection technology - digital watermarking technology has been put forward internationally.)