Fully phase-based encryption using fractional order Fourier domain random phase encoding: error analysis

被引：15
作者：
Nishchal, NK [1 ]
Joseph, J [1 ]
Singh, K [1 ]
机构：
[1] Indian Inst Technol, Photon Grp, Dept Phys, New Delhi 110016, India
来源：
OPTICAL ENGINEERING | 2004年 / 43卷 / 10期
关键词：
phase encryption; decryption; fractional Fourier transform; error analysis;
D O I：
10.1117/1.1790503
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The performance of a fully phase-based encryption system is analyzed. The encryption is done using a double random fractional Fourier domain random phase encoding technique. The input amplitude data to be encrypted are binary text and a grayscale image of Lena. We study the tolerance to data loss and binarization of the encrypted data/image. The effects of noise perturbations on the encrypted data are also studied. To evaluate the quality of the recovered image, the mean-square error is used as a metric to compare the recovered image with the original input image. Results of computer simulation are presented for analysis. (C) 2004 Society of Photo-Optical Instrumentation Engineers.
引用
收藏
页码：2266 / 2273
页数：8
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