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Optical image encryption by random shifting in fractional Fourier domains
Author(s)
Date Issued
2003-02-15
Date Available
2012-02-22T14:38:53Z
Abstract
A number of methods have recently been proposed in the literature for the encryption of two-dimensional information by use of optical systems based on the fractional Fourier transform. Typically, these methods require random phase screen keys for decrypting the data, which must be stored at the receiver and must be carefully aligned with the received encrypted data. A new technique based on a random shifting, or jigsaw, algorithm is proposed. This method does not require the use of phase keys. The image is encrypted by juxtaposition of sections of the image in fractional Fourier domains. The new method has been compared with existing methods and shows comparable or superior robustness to blind decryption. Optical implementation is discussed, and the sensitivity of the various encryption keys to blind decryption is examined.
Sponsorship
Other funder
Other Sponsorship
Enterprise Ireland
Type of Material
Journal Article
Publisher
Optical Society of America
Journal
Optics Letters
Volume
28
Issue
4
Start Page
269
End Page
271
Copyright (Published Version)
2003 Optical Society of America
Subject – LCSH
Data encryption (Computer science)
Fourier transform optics
Signal processing
Image processing
Web versions
Language
English
Status of Item
Not peer reviewed
ISSN
0146-9592
1539-4794
This item is made available under a Creative Commons License
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Optical image encryption by random shifting in fractional Fourier domains.pdf
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