基于二重加密的数字水印算法  

A Digital Watermarking Algorithm Based on Double Encryption

作　　者：占履军[1] 李昇 张旭东 

机构地区：[1]华南师范大学物理与电信工程学院,广州510006 [2]肇庆市四会中学,肇庆526200

出　　处：《华南师范大学学报（自然科学版）》2017年第6期7-11,共5页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(61471175);广东省科技计划项目(2016A010101022)

摘　　要：采用二重或多重置乱的方式对水印置乱加密,针对个人版权的保密问题,提出了多重置乱产生多种密钥及其加密流程的方法,增加了水印的破解难度.以Arnold置乱和采样置乱对水印进行二重加密为例,研究了水印的不可见性和鲁棒性,并与一重置乱加密进行了比较,发现二重置乱的鲁棒性最好,其次是Arnold置乱,最差的是采样置乱.研究表明,二重加密能够达到同时保护2人共有图像版权的目的,可采用多重置乱方法保护多人共有版权.因此,文章提出的实验方法可为寻找更好的加密方法提供参考.Double scrambling or multiple resetting is used to encrypt the watermark scrambling. Aiming at the privacy problem of personal copyright,a method of resetting multiple keys and generating a plurality of encryption keys are proposed,which increases the difficulty of breaking the watermark. Arnold scrambling and sampling scrambling for the double encryption are taken as examples to study the imperceptibility and robustness. They are compared with single scrambling and it is found that the robustness of double scrambling is the best,followed by Arnold scrambling and sampling scrambling is the worst one. The experiment shows that the double encryption can be able to protect the copyright of two images at the same time,and multiple reset methods can be used to protect the copyright. Therefore,the experimental method proposed in this paper can provide a reference for finding better encryption methods.

关 键 词：数字水印 二重加密 ARNOLD置乱 采样置乱 

分 类 号：TN919.8[电子电信—通信与信息系统]