Symmetric cryptosystem to secure images utilizing chaotic deterministic phase mask in Fresnel transform domain employing singular value decomposition

This research work proposes a lens less secure symmetric image encryption system using a novel chaotic deterministic phase mask (CDPM) in the light of Fresnel transform (FrT) deploying singular value decomposition (SVD). Here, two CDPM's are used instead of random phase masks (RPM) in Fresnel transform based double random phase encoding (DRPE) scheme with the addition of SVD. The variation of CDPM and SVD amplifies the security of the Fresnel transform based DRPE in comparison to the traditional one. The key space of the proposed cryptosystem is large constituting the complex phase masks (CDPM), the order of SVD, the distance between the significant planes and the wavelength of the Fresnel transform. The system is simple, fast and tough to break. The encrypted image can be sent over an unsecured channel since the security lies in the secrecy of the keys. The enhanced framework resists the possible attacks on traditional DRPE and therefore reinforces DRPE security. The utilization of a novel complex mask that gives advantages of both chaotic map and deterministic phase mask improves the quality of the cryptosystem. The performance analysis and the result outcomes exhibit the efficacy of the designed cryptosystem. (C) 2020 The Authors. Published by Elsevier B.V.