基于位平面置乱的图像加密算法研究  

Research on Image Encryption Algorithm Based on Bit Plane Disruption

作　　者：时晨阳 刘嵩 Shi Chenyang;Liu Song(College of Intelligent Systems Science and Engineering,Hubei Minzu University,Enshi,Hubei 445000,China)

机构地区：[1]湖北民族大学智能科学与工程学院,湖北恩施445000

出　　处：《机电工程技术》2024年第4期115-120,共6页Mechanical & Electrical Engineering Technology

基　　金：恩施州科技计划项目(D20220015)。

摘　　要：近年来,随着人们对电子信息隐私及网络安全重视程度的不断提高,对信息加密技术的要求更加严格,图像加密技术备受关注。因此,提出一种基于位平面的图像加密算法。将明文图像矩阵中的每个像素值分解为8个比特位,把相同位置上的比特位组合成高四位和低四位2个位平面矩阵;采用多涡卷混沌系统生成的混沌序列,对2个位平面矩阵进行置乱-扩散-置乱,得到加密图像;在MATLAB平台上进行了直方图、相邻像素相关性、密钥敏感性、信息熵、抗剪裁性等安全性分析。结果表明:所提出的图像加密算法能够进行安全有效的图像加密,且安全分析表示其加密后图像直方图平稳、像素相关性系数趋近于0、信息熵达到7.9960以上,在加密效果与安全性方面都有良好的表现,可以抵御多种攻击的干扰,能够对图像信息进行安全保护。In recent years,with the increasing emphasis on electronic information privacy and network security,people have more stringent requirements on information encryption technology,and image encryption technology has attracted much attention.Therefore,an image encryption algorithm based on bit plane is presented.Each pixel value in the plaintext image matrix is decomposed into 8 bits,and the bits in the same position are combined into two bit plane matrices with high and low four bits;the chaotic sequence generated by the multi-scroll chaotic system is used to scramble-diffuse-scramble the two bit plane matrices,and the encrypted image is obtained;security analysis such as histogram,correlation of adjacent pixels,key sensitivity,information entropy and anti-clipping are carried out on MATLAB platform.The results show that the proposed image encryption algorithm can be used to encrypt images safely and effectively,and the security analysis shows that after encryption,the image histogram is stable,the pixel correlation coefficient is close to 0,and the information entropy is above 7.9960.It has good performance in terms of encryption effect and security,and can be used to resist the interference of various attacks and protect image information securely.

关 键 词：图像加密 位平面 行列置乱 混沌 安全性分析 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]