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中文摘要：
首先提出了一种可应用于加密的三维Z矩阵映射,并从理论上证明了其良好的密码学特性,其次提出了两种基于不同选择加密模板的彩色图像退化算法并进行了仿真实验.最后,对所提出的两种退化算法从性能和安全性上进行了有效的分析,证明了算法的可靠性.
英文摘要：
With the development of information technology and network, multimedia protection has become a major concern, in which images are the important research objects . Especially, the image degradation is one of basic fields. This paper introduces a three-dimensional Z-matrix map which can be used for encryption, and shows its satisfactory property. Then, two color image degradation algorithms based on different templates for selective encryption are proposed. Finally, the performance and security of them are analyzed. Simulation results indicate the reliability of these schemes.
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