Chen Wen, Chen Xudong
Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore.
Appl Opt. 2012 Sep 1;51(25):6076-83. doi: 10.1364/AO.51.006076.
In recent years, optical image encryption has attracted more and more attention in information security due to its unique advantages, such as parallel processing and multiple-parameter characteristics. In this paper, we propose a new method using three-dimensional (3D) processing strategy for interference-based optical image encryption. The plaintext is considered as a series of particles distributed in 3D space, and any one sectional extraction cannot render information about the plaintext during image decryption. In addition, the silhouette problem in the conventional interference-based optical encryption method is effectively suppressed, and the proposed optical cryptosystem can achieve higher security compared with the previous work. A numerical experiment is conducted to demonstrate the feasibility and effectiveness of the proposed method.
近年来，光学图像加密因其独特优势，如并行处理和多参数特性，在信息安全领域受到越来越多的关注。本文提出一种基于三维（3D）处理策略的干涉型光学图像加密新方法。明文被视为分布在三维空间中的一系列粒子，在图像解密过程中，任何一个截面提取都无法呈现关于明文的信息。此外，有效抑制了传统干涉型光学加密方法中的轮廓问题，与之前的工作相比，所提出的光学密码系统能够实现更高的安全性。进行了数值实验以证明所提方法的可行性和有效性。
