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Optical Engineering

Double random fractional Fourier domain encoding for optical security
Author(s): G. Unnikrishnan; Kehar Singh
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Paper Abstract

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.

Paper Details

Date Published: 1 November 2000
PDF: 7 pages
Opt. Eng. 39(11) doi: 10.1117/1.1313498
Published in: Optical Engineering Volume 39, Issue 11
Show Author Affiliations
G. Unnikrishnan, Indian Institute of Technology Delhi (India)
Kehar Singh, Indian Institute of Technology (India)


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