基于相位截断菲涅耳变换的彩色图像加密系统  

Phase-truncated Fresnel transform based color image encryption system

作　　者：洪英汉[1] 熊建斌[2] 

机构地区：[1]韩山师范学院,广东潮州521041 [2]广东石油化工学院计算机与电子信息学院,广东茂名525000

出　　处：《现代电子技术》2016年第2期73-77,共5页Modern Electronics Technique

基　　金：国家自然科学基金(61473331);广东省科技计划项目(2012B040500034)

摘　　要：针对相位截断的加密系统无法抵御信息泄露的问题,提出一种基于相位截断菲涅耳变换与随机振幅掩模的加密系统,以抵御信息泄露的问题。将图像分为3个独立的颜色通道,并加入随机幅度掩模通道,对4个通道分别进行菲涅耳衍射截断处理。通过级联处理过程提高了秘钥与密文之间的关联性并消除了信息泄露的风险。最终进行了仿真试验,结果证明,该算法对一般攻击具有较好的鲁棒性,同时解决了信息泄露的问题,优于已有的同类型算法。Aimed at the problem of information disclosure of the existing encryption system based on phase-truncation,a new encryption system based on phase-truncation Fresnel transform and random amplitude mask is proposed to withstand the information disclosure. The color image is divided into three independent color channels,and then a random amplitude mask channel is added. The Fresnel diffraction truncation processing for the four channels are conducted. The relevance between the secret key and ciphertext is enhanced by the cascade processing to eliminate the risk of information disclosure. The simulation experiment results show that the proposed algorithm has good robustness for the general attacks,and can solve the information disclosure problem. The algorithm is better than other same-type algorithms.

关 键 词：彩色图像 光学处理 相位截断 菲涅耳变换 图像加密 图像解密 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]