基于DNA-记忆元胞自动机与Hash函数的图像加密算法  

Image encryption algorithm based on DNA-memory element automaton and Hash function

作　　者：李凯佳[1] 俞锐刚[1] 袁凌云[2] LI Kai-jia;YU Rui-gang;YUAN Ling-yun(College of Information Technology, Kunming University, Kunming 650214, China;College of Information Engineering, Yunnan Normal University, Kunming 650500,China)

机构地区：[1]昆明学院信息技术学院,云南昆明650214 [2]云南师范大学信息学院,云南昆明650500

出　　处：《计算机工程与设计》2017年第2期470-477,共8页Computer Engineering and Design

基　　金：云南省教育厅基金项目(09C0134);昆明学院科研基金项目(XJL12005;XJL13009)

摘　　要：为有效防止图像信息在网络传输中被攻击,提出基于DNA-记忆元胞自动机与Hash函数的低延迟图像加密认证算法。迭代2DLogistic混沌映射,输出混沌序列,引入位置集合混淆技术,扰乱明文像素位置,形成置乱图像;定义迭代时延函数,将其嵌入2DTinkerbell混沌映射中,形成低时延混沌序列,建立DNA的标准规则;利用DNA标准规则,将置乱图像转变成随机性强的DNA序列;综合考虑多个时刻的元胞状态,改变其局部转换规则,改进元胞自动机,使其具备记忆功能,联合DNA序列,构造像素扩散联合模型,对混淆密文进行加密,彻底篡改其像素值,有效提高算法的抗攻击能力;融合Hash检测函数,通过检测扰乱密文的与置乱图像的Hash值,对图像信息的真伪完成认证。实验结果表明,与当前图像加密算法相比,所提加密技术具备更高的安全性与抗差分攻击特性,面对各种攻击时,该算法的用户响应更高。To effectively prevent the image information from being attacked in the network transmission,the low delay image en-cryption algorithm based on DNA-memory element automaton and chaotic map was proposed The low delay chaotic sequence was formed by defining an iterative delay function and embedding it into2D chaotic map.The plaintext pixel position was disrup-ted by introducing the location set obfuscation technology.Subsequently,the pixel diffusion joint model was defined by combi-ning the DNA and cell automaton to encrypt the cipher for completely tampering its pixel value and effectively improving the abi-lity of anti attack.Experimental results show that the encryption technology proposed has higher security and anti differential at-tacks ability compared with the current image encryption algorithm.

关 键 词：图像加密记忆 元胞自动机 DNA标准规则 时延函数 Hash检测 用户响应 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]