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Spread-space spread-spectrum technique for secure multiplexing
Date Issued
2007-05-01
Date Available
2012-01-05T15:18:00Z
Abstract
A novel technique for multiplexing complex images is proposed in which each image may be demultiplexed only if a set of random encryption keys is known. The technique utilizes the ability of the double random phase encoding method to spread a signals’ energy in both the space and the spatial frequency domains in a controlled manner. To multiplex, images are independently encrypted with different phase keys and then superimposed by recording sequentially on the same material. Each image is extracted by using the particular key associated with it. During decryption the energy from the other images is further spread, making it possible to minimize its effects by using suitable filters. Wigner analysis is applied to the technique, and numerical results are presented.
Sponsorship
Irish Research Council for Science, Engineering and Technology
Type of Material
Journal Article
Publisher
Optical Society of America
Journal
Optics Letters
Volume
32
Issue
9
Start Page
1060
End Page
1062
Copyright (Published Version)
2007 Optical Society of America
Subject – LCSH
Spread spectrum communications
Multiplexing
Signal processing
Fourier transform optics
Holography
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Not peer reviewed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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Spread space spread spectrum technique for secure multiplexing.pdf
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312.74 KB
Format
Owning collection
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