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A research of the pretreatment of scrambling encryptions for digital watermarking images

YAN Xiao-dong~1, SUN Xie-hua~2(1. College of Optics and Electronics Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China; 2. College of Information Engineering, China Jiliang University, Hangzhou 310018, China)  
This paper analyses the characteristics of chaos scrambling and block cipher algorithms, and illuminates the security and results of the pretreatment of scrambling encryptions. It brings forward a new kind of semi-fragile watermark algorithm based on the pretreatment of scrambling encryptions.
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