基于JTC和像素置乱技术的光学图像加密

摘要

随着信息技术的迅猛发展,数据加密和安全认证等信息安全问题变得越来越重要.光学信息处理技术具有强大的并行数据处理能力、更多的自由度和高的数据安全性,因此,基于光学信息处理的加密系统得到了广泛的研究.提出了一种基于联合变换相关器和像素置乱技术的光学图像加密方法,此方法基于联合变换器的加密系统,将联合变换功率谱的像素置乱后作为加密图像,像素的排列顺序与随机相位板一起作为解密密钥.计算机模拟试验证实了这种方法的可行性和有效性.%With the rapid development of the Internet,the issue of information security of data encryption and secure identification is becoming more and more important.Because of the advantages of the optical information processing techniques,such as large parallel date processing capability,more degrees of freedom,and high-level data security,many encryption systems based on the optical information processing have been extensively studied.A new method of optical image encryption with a joint transform correlator and pixel scrambling technology is presented.This method is based on a joint transform correlator,the joint power spectrum whose pixels have been scrambled is the encrypted image and the orders of the pixel scrambling as well as the random-phase mask are used as the keys to decrypt the original image.Computer simulations have verified the feasibility and validity of this method.