Image Processing

Optical image encryption using multilevel Arnold transform and noninterferometric imaging

[+] Author Affiliations
Wen Chen

National University of Singapore, Department of Electrical and Computer Engineering, 4 Engineering Drive 3, Singapore 117576, Singapore

Xudong Chen

National University of Singapore, Department of Electrical and Computer Engineering, 4 Engineering Drive 3, Singapore 117576, Singapore

Opt. Eng. 50(11), 117001 (October 24, 2011). doi:10.1117/1.3643724
History: Received May 29, 2011; Revised August 30, 2011; Accepted September 07, 2011; Published October 24, 2011; Online October 24, 2011
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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.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Wen Chen and Xudong Chen
"Optical image encryption using multilevel Arnold transform and noninterferometric imaging", Opt. Eng. 50(11), 117001 (October 24, 2011). ; http://dx.doi.org/10.1117/1.3643724


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