Imaging Components, Systems, and Processing

Choice of optical system is critical for the security of double random phase encryption systems

[+] Author Affiliations
Inbarasan Muniraj, Changliang Guo, Derek Cassidy, James P. Ryle, John J. Healy, John T. Sheridan

University College Dublin, School of Electrical and Electronic Engineering, IOE2 Lab, Dublin, Ireland

Ra’ed Malallah

University College Dublin, School of Electrical and Electronic Engineering, IOE2 Lab, Dublin, Ireland

University of Basrah, Physics Department, Faculty of Science, Garmat Ali, Basrah, Iraq

Liang Zhao

University College Dublin, School of Electrical and Electronic Engineering, IOE2 Lab, Dublin, Ireland

University College Dublin, The Insight Centre for Data Analytics, Belfield, Dublin, Ireland

Opt. Eng. 56(6), 063103 (Jun 14, 2017). doi:10.1117/1.OE.56.6.063103
History: Received March 30, 2017; Accepted May 26, 2017
Text Size: A A A

Abstract.  The linear canonical transform (LCT) is used in modeling a coherent light-field propagation through first-order optical systems. Recently, a generic optical system, known as the quadratic phase encoding system (QPES), for encrypting a two-dimensional image has been reported. In such systems, two random phase keys and the individual LCT parameters (α,β,γ) serve as secret keys of the cryptosystem. It is important that such encryption systems also satisfy some dynamic security properties. We, therefore, examine such systems using two cryptographic evaluation methods, the avalanche effect and bit independence criterion, which indicate the degree of security of the cryptographic algorithms using QPES. We compared our simulation results with the conventional Fourier and the Fresnel transform-based double random phase encryption (DRPE) systems. The results show that the LCT-based DRPE has an excellent avalanche and bit independence characteristics compared to the conventional Fourier and Fresnel-based encryption systems.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Inbarasan Muniraj ; Changliang Guo ; Ra’ed Malallah ; Derek Cassidy ; Liang Zhao, et al.
"Choice of optical system is critical for the security of double random phase encryption systems", Opt. Eng. 56(6), 063103 (Jun 14, 2017). ; http://dx.doi.org/10.1117/1.OE.56.6.063103


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