面向云环境的彩色图像混合加密算法  

A Cloud Environment-oriented Color Image Hybrid Encryption Algorithm

作　　者：陈庄[1] 于溯 罗颂[1] 蔡定雯 CHEN Zhuang;YU Su;LUO Song;CAI Dingwen(College of Computer Science and Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学计算机科学与工程学院,重庆400054

出　　处：《电讯技术》2021年第12期1562-1572,共11页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61872051)。

摘　　要：针对传统图像加密算法难以保证在云环境下密钥配送的安全性,以及DNA编码在抗统计学分析效果欠佳等问题提出了一种面向云环境的彩色图像混合加密算法。提出了一种自适应DNA编码对传统方法进行改善,通过国产SM2与SM3加密算法作为散列值的生成函数与控制参数的非对称加密,运用盲水印技术镶嵌至密文图像中。实验结果表明,该算法密钥空间大且加密图像相邻像素相关性较低,具有更为接近理想值的像素改变率与像素平均改变强度,具有较为理想的安全性同时在密钥的传输过程中由非对称加密算法保证其安全可靠。The traditional image encryption algorithm can hardly ensure the security of secret key distribution in the cloud environment and the performance of DNA coding is poor in anti-statistical analysis.To solve the problems,a cloud environment-oriented color image hybrid encryption algorithm is proposed.An adaptive DNA coding is put forward to improve the traditional method.The domestic SM2 and SM3 encryption algorithms are served as the generation function of Hash value and the asymmetric encryption of control parameters respectively,both of which are embedded into cipher-text image by using the blind watermarking technology.Experimental results show that this algorithm,featured by a large secret key space and low correlation between adjacent pixels of the encrypted image,has more ideal pixel change rate and average pixel change intensity.In addition,to the relatively ideal security,it ensures the security and reliability of secret key in transmission process via the asymmetric encryption algorithm.

关 键 词：彩色图像 国产加密算法 混沌映射 图像置乱 云环境 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]