Double random fractional Fourier-domain encoding for optical security

被引：204

作者：

Unnikrishnan, G ^{[1
]}

Singh, K ^{[1
]}

机构：

[1] Indian Inst Technol, Photon Grp Delhi, New Delhi 110016, India

来源：

OPTICAL ENGINEERING | 2000年 / 39卷 / 11期

关键词：

fractional Fourier transform; optical encryption; random phase mask;

D O I：

10.1117/1.1313498

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a new optical encryption technique using the fractional Fourier transform. In this method, the data are encrypted to a stationary white noise by two statistically independent random phase masks in fractional Fourier domains. To decrypt the data correctly, one needs to specify the fractional domains in which the input plane, encryption plane, and output planes exist, in addition to the key used for encryption. The use of an anamorphic fractional Fourier transform for the encryption of two-dimensional data is also discussed. We suggest an optical implementation of the proposed idea. Results of a numerical simulation to analyze the performance of the proposed method are presented. (C) 2000 Society of Photo-Optical instrumentation Engineers. [S0091-3286(00)01811-0].

引用

页码：2853 / 2859

页数：7

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