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Optical Engineering

Optical image encryption using multilevel Arnold transform and noninterferometric imaging
Author(s): Wen Chen; Xudong Chen
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Paper Abstract

Information security has attracted much current attention due to the rapid development of modern technologies, such as computer and internet. We propose a novel method for optical image encryption using multilevel Arnold transform and rotatable-phase-mask noninterferometric imaging. An optical image encryption scheme is developed in the gyrator transform domain, and one phase-only mask (i.e., phase grating) is rotated and updated during image encryption. For the decryption, an iterative retrieval algorithm is proposed to extract high-quality plaintexts. Conventional encoding methods (such as digital holography) have been proven vulnerably to the attacks, and the proposed optical encoding scheme can effectively eliminate security deficiency and significantly enhance cryptosystem security. The proposed strategy based on the rotatable phase-only mask can provide a new alternative for data/image encryption in the noninterferometric imaging.

Paper Details

Date Published: 1 November 2011
PDF: 6 pages
Opt. Eng. 50(11) 117001 doi: 10.1117/1.3643724
Published in: Optical Engineering Volume 50, Issue 11
Show Author Affiliations
Wen Chen, National Univ. of Singapore (Singapore)
Xudong Chen, National Univ. of Singapore (Singapore)

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