基于广义签密和DWT技术的图像水印算法  

Watermarking algorithm for image based on generalized signcryption and DWT technique

作　　者：杨晓元[1] 李秀广[1] 郝斌[1] 张敏情[1] 

机构地区：[1]武警工程学院电子技术系网络与信息安全武警部队重点实验室

出　　处：《计算机工程与应用》2007年第36期86-88,219,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(the National Natural Science Foundation of China under Grant No.60473029);网络与信息安全教育部重点实验室开放课题奖励项目(No.200409)

摘　　要：设计了一种基于广义签密和DWT的水印算法,该算法既可以对待嵌入水印进行快速签密,又可以在需要时对其进行单独的加密或签名,大大提高了数字水印的安全性和灵活性。同时,该算法考虑到人眼的HVS特性,保证了鲁棒性和自适应能力。实验表明,在不同的图像处理和多种攻击下,算法具有鲁棒性强、检测时不需要原始图像、安全性好的优点。This paper proposes a watermarking algorithm based on generalized signcryption and DWT.The algorithm not only can perform signcryption quickly for watermark,but also can encrypt or sign it separately when needed,which greatly improves the security and flexibility of digital watermarking.At the same time,owing to the HVS characteristics of human eyes are considered, the algorithm＇s robustness and adaptability have been ensured.The experiments have demonstrated that the proposed algorithm has advantages such as strong robustness against various image processing and attacks,not requiring the original image for watermarking detection,and good security.

关 键 词：广义签密 数字图像水印 离散小波变换 自适应量化 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]