Color image encryption and decryption using fractional Fourier transform
Color image encryption and decryption using fractional Fourier transform
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DOI：
10.1016/j.optcom.2007.07.012
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发表时间：
2007-11-01
影响因子：
2.4
通讯作者：
Singh, Kehar
中科院分区：
文献类型：
--
作者：
Joshi, Madhusudan;Chandrashakher;Singh, Kehar
我们提出使用分数傅里叶变换（FRT）对彩色图像进行加密。要加密的图像首先被分离为三个颜色通道：红色、绿色和蓝色。在分数傅里叶变换域中，使用双随机相位编码对这些通道中的每一个进行独立加密。加密和解密过程中使用的不同分数阶和随机相位掩模是提高所提出系统安全性的关键。讨论了实现所提出的加密和解密方案的算法，并给出了数字模拟的结果。该技术被证明是一种对彩色文本加密很有效的方法。我们还概述了算法的实现，并检验了其在解密过程中对分数阶变化的敏感性。（C）2007爱思唯尔B.V. 版权所有。
We propose the encryption of color images using fractional Fourier transform (FRT). The image to be encrypted is first segregated into three color channels: red, green, and blue. Each of these channels is encrypted independently using double random phase encoding in the FRT domain. The different fractional orders and random phase masks used during the process of encryption and decryption are the keys to enhance the security of the proposed system. The algorithms to implement the proposed encryption and decryption scheme are discussed, and results of digital simulation are presented. The technique is shown to be a powerful one for colored text encryption. We also outline the implementation of the algorithm and examine its sensitiveness to changes in the fractional order during decryption. (C) 2007 Elsevier B.V. All rights reserved.