Information security system by iterative multiple-phase retrieval and pixel random permutation
Information security system by iterative multiple-phase retrieval and pixel random permutation
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DOI：
10.1364/ao.45.003289
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发表时间：
2006-05-10
期刊：
影响因子：
1.9
通讯作者：
Dong, Guo-Yan
中科院分区：
文献类型：
--
作者：
Meng, Xiang-Feng;Cai, Lu-Zhong;Dong, Guo-Yan
提出了一种基于迭代菲涅尔变换多阶段检索和像素随机排列技术的信息安全系统。该方法采用一系列级联的相位掩模，每次迭代同时调整掩模的相位分布。与双相位编码和空频域中的类似方法相比，在相同数量的相位掩模下，它可以实现更快的收敛和更好的恢复图像质量，并且可以提供更高的密钥空间自由度，更多的几何参数作为补充密钥。此外，通过引入PRP技术，该方法的安全级别大大提高。计算机仿真验证了该方法的可行性及其对遮挡和附加噪声攻击的鲁棒性。以相关系数和均方误差为收敛准则，系统地研究了不同相位掩模数目和不同量化相位电平下的该技术的性能。(c)2006年美国光学学会。
A novel information security system based on multiple-phase retrieval by an iterative Fresnel-transform algorithm and pixel random permutation (PRP) technique is proposed. In this method a series of phase masks cascaded in free space are employed and the phase distributions of all the masks are adjusted simultaneously in each iteration. It can achieve faster convergence and better quality of the recovered image compared with double-phase encoding and a similar approach in the spatial-frequency domain with the same number of phase masks and can provide a higher degree of freedom in key space with more geometric parameters as supplementary keys. Furthermore, the security level of this method is greatly improved by the introduction of the PRP technique. The feasibility of this method and its robustness against occlusion and additional noise attacks are verified by computer simulations. The performance of this technique for different numbers of phase masks and quantized phase levels is investigated systematically with the correlation coefficient and mean square error as convergence criterions. (c) 2006 Optical Society of America.