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中文摘要：
随着网络通信的普及,许多传统媒体内容都向数字化转变,人们愈来愈重视信息的安全问题和版权保护问题。传统的加密技术在数据传输过程中可以起到保护作用,但数据被接收并解密,其保护作用也随之消失。数字水印技术作为传统加密技术的补充手段,它是一种保护版权和认证来源的新技术。文中对二者进行比较,深刻地理解它们之间的关系,为更好地理解数字水印,具有重要的理论和现实意义,并指出了数字水印的发展方向。
英文摘要：
With the popularization of network communications, many traditional media shift their styles into that of digitalization,there is a growing emphasis on information security issues and copyright protection. The traditional cryptographic technology may play the protective role in data transmission process,and when data is received and deciphered,its protective function along with it is also vanished.The digital watermarking,as an supplement measure of tradition encryption,is a new technology in protection of the copyright and the authentication origin. In this paper, cryptography and digital watermarking technology are compared and deeply understanding the relationship between these two techniques, so as to get a profound understanding of the relationship between the two. Finally it has theoretical and practical meaning,and the development trend of digital watermarking is also pointed out.
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