Double random fractional Fourier-domain encoding for optical security
Authors:
- 1 November 2000
- journal article
- Published by SPIE-Intl Soc Optical Eng in Optical Engineering
- Vol. 39 (11) , 2853-2859
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. © 2000 Society of Photo-Optical Instrumentation Engineers.Keywords
This publication has 13 references indexed in Scilit:
- Encrypted optical memory system using three-dimensional keys in the Fresnel domainOptics Letters, 1999
- Introduction to the Fractional Fourier Transform and Its Applications1999
- Optical encryption system that uses phase conjugation in a photorefractive crystalApplied Optics, 1998
- Product and Convolution Theorems for the Fractional Fourier TransformIEEE Signal Processing Letters, 1997
- Digital computation of the fractional Fourier transformIEEE Transactions on Signal Processing, 1996
- Space–bandwidth product of optical signals and systemsJournal of the Optical Society of America A, 1996
- Fractional Fourier domainsSignal Processing, 1995
- Optical image encryption based on input plane and Fourier plane random encodingOptics Letters, 1995
- Convolution, filtering, and multiplexing in fractional Fourier domains and their relation to chirp and wavelet transformsJournal of the Optical Society of America A, 1994
- Image rotation, Wigner rotation, and the fractional Fourier transformJournal of the Optical Society of America A, 1993