Optical image encryption using Kronecker product and hybrid phase masks. (1st October 2017)

• Record Type: Journal Article
• Authors: Kumar, Ravi; Bhaduri, Basanta
• Is Part Of: Optics & laser technology. Volume 95(2017)
• Page Start: 51
• Page End: 55
• Publication Date: 2017-10-01
• Subjects: Kronecker product -- Fresnel propagation -- Image encryption -- Information security; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2017.03.041
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: A new technique for optical image encryption using Kronecker product (KP) along with DRPE technique is proposed. KP of two random matrices for image encryption is proposed for the first time. Hybrid phase masks are used instead of simple random phase masks (RPM) using a secondary image and RPM. The proposed technique is robust against the noise, occlusion and Known plaintext attacks. Abstract: 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.