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

Inbarasan Muniraj; Changliang Guo; Ra’ed Malallah; Derek Cassidy; Liang Zhao; James P. Ryle; John J. Healy; John T. Sheridan

doi:10.1117/1.OE.56.6.063103

14 June 2017 Choice of optical system is critical for the security of double random phase encryption systems

Inbarasan Muniraj, Changliang Guo, Ra’ed Malallah, Derek Cassidy, Liang Zhao, James P. Ryle, John J. Healy, John T. Sheridan

Author Affiliations +

Funded by: Irish Research Council for Science, Engineering, and Technology (IRCSET), Science Foundation Ireland, Enterprise Ireland, Iraqi Ministry of Higher Education and Scientific Research

Optical Engineering, Vol. 56, Issue 6, 063103 (June 2017). https://doi.org/10.1117/1.OE.56.6.063103

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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Inbarasan Muniraj, Changliang Guo, Ra’ed Malallah, Derek Cassidy, Liang Zhao, James P. Ryle, John J. Healy, and John T. Sheridan "Choice of optical system is critical for the security of double random phase encryption systems," Optical Engineering 56(6), 063103 (14 June 2017). https://doi.org/10.1117/1.OE.56.6.063103

Received: 30 March 2017; Accepted: 26 May 2017; Published: 14 June 2017

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