4.7 Article

Optical image encryption using Kronecker product and hybrid phase masks

Journal

OPTICS AND LASER TECHNOLOGY
Volume 95, Issue -, Pages 51-55

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2017.03.041

Keywords

Kronecker product; Fresnel propagation; Image encryption; Information security

Funding

  1. Indian Institute of Technology (Indian School of Mines) Dhanbad, India [FRS(100)/2015-2016/APH]

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In this paper, we propose a new technique for security enhancement in optical image encryption system. In this technique we have used the Kronecker product of two random matrices along with the double random phase encoding (DRPE) scheme in the Fresnel domain for optical image encryption. The phase masks used here are different than the random masks used in conventional DRPE scheme. These hybrid phase masks are generated by using the combination of random phase masks and a secondary image. For encryption, the input image is first randomized and then the DRPE in the Fresnel domain is performed using the hybrid phase masks. Secondly, the Kronecker product of two random matrices is multiplied with the DRPE output to get the final encoded image for transmission. The proposed technique consists of more unknown keys for enhanced security and robust against various attacks. The simulation results along with effects under various attacks are presented in support of the proposed technique. (C) 2017 Elsevier Ltd. All rights reserved.

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