基于Baker映射和量子混沌的图像加密算法  

IMAGE ENCRYPTION ALGORITHM BASED ON BAKER MAPPING AND QUANTUM CHAOS

作　　者：谢国波[1] 杨彬[1] 

机构地区：[1]广东工业大学计算机学院,广东广州510006

出　　处：《计算机应用与软件》2016年第12期318-320,333,共4页Computer Applications and Software

基　　金：广东省重大科技专项(2012A080103010);广东省省级科技计划项目(2015B010129014);广东省自然科学基金项目(2014A030313512);广东省重点实验室建设专项(2011A091000046);粤港关键领域重点突破项目(2012A080107007)

摘　　要：针对图像加密,研究一种复合混沌加密算法。采用量子Logistic混沌序列与Baker映射置乱后的图像进行复合加密运算。首先,用Baker映射对图像分块进行置乱,再用量子Logistic混沌与置乱后图像进行扩散加密运算。该算法通过引入量子混沌系统,解决了Logistic混沌系统随机性差、控制参数少的问题,大大增加了破译难度。该方案改善了计算机对浮点数运算精度丢失造成的混沌系统出现周期性这一固有问题。实验结果分析得到,该加密方案秘钥空间大、安全性好。We studied a composite chaotic encryption algorithm for image encryption. It uses quantum Logistic chaotic sequence and the image scrambled with Baker mapping to carry out the composite encryption operation. First,it uses Baker mapping to scramble image blocks, and then employs quantum Logistic chaos and the scrambled image to operate the diffusion eneryption. The algorithm solves the problem of Logistic chaotic system in poor randomness and less control parameters by introducing quantum chaos system, and increases the difficulty of deciphering greatly. This scheme not only improves the inherent problem of periodicity appeared in chaotic system caused by computer losing its precision of floating-point operations. It is derived from the analysis on experimental results that this encryption scheme has big key space and good security.

关 键 词：BAKER映射 量子混沌系统 图像加密 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]