Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Nonlinear optical security system with a modified amplitude phase retrieval algorithm

Yong Wang, Chenggen Quan, Cho Jui Tay

Published Mar 6, 2015• 0 citations

Abstract

A new nonlinear optical image encryption scheme based on a modified amplitude phase retrieval algorithm is proposed. With two random phase masks that serve as the public encryption keys, one iterative amplitude and phase retrieval process is employed to encode the primary image into a stationary white noise. The two private keys generated in the encryption process are randomly distributed binary matrices to be used to perform one-way binary phase modulations. The proposed encryption process is nonlinear and offers enhanced security. Numerical simulations are presented to demonstrate the feasibility and security of the proposed system. The results also illustrate that the computing efficiency of the algorithm is improved and the number of iterations is much less than that of cryptosystem based on Yang-Gu algorithm, which has two iteration processes.

DOI: 10.1117/12.2081138

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