基于DNA合成图像和混沌映射的图像加密算法  

Research of Image Encryption Algorithm Based on DNA Image Synthesis and Chaotic Mapping

作　　者：李桂珍[1] 任晓芳[2] LI Gui-zhen;REN Xiao-fang(The Branch of Information Technology,Xinjiang Agricultural Vocational Technical College,Changji831100,China;Department of Computer Engineering,Xinjiang Institute of Engineering,Urumqi,XinJiang 830052,China)

机构地区：[1]新疆农业职业技术学院信息技术分院,新疆昌吉831100 [2]新疆工程学院计算机工程系,乌鲁木齐830052

出　　处：《控制工程》2018年第7期1278-1284,共7页Control Engineering of China

摘　　要：为了向图像加密算法注入更多的伪随机性,以提高算法的性能,提出一种基于DNA合成图像和混沌映射的彩色图像加密算法,其主要改进体现在计算规则上。首先,对于彩色图像的每个像素,采用多个DNA编码规则替换单一编码规则;然后,对于像素扩散,采用多个DNA操作代替单个DNA操作;最后,将要加密的图像与原图像相结合,并将加密后的图像与另一合成图像相结合。仿真结果和安全性分析验证了本文算法的有效性,与其他算法相比,密钥空间的复杂度和安全性分析验证了提出算法所需的操作更少。统计攻击分析、密钥敏感度、差分攻击分析等证明了提出算法拥有更高的安全性和有效性。In order to add more pseudo randomness to image encryption algorithm and improve the performance of algorithm, this paper proposed a color image encryption algorithm based on DNA synthesis image and chaotic mapping and the main improvement of the algorithm was reflected in the calculation rules. Firstly, for each pixel of a color image, the algorithm used multiple DNA encoding rules to replace the single encoding rule. Then, for the pixel diffusion, it used multiple DNA operations to replace a single DNA operation. Finally, it merged the encrypting image and the origin image and combined the encrypted image with another synthesized image. Simulation results and safety analysis verifies the effectiveness of the algorithm. The complexity of key space and the security analysis denote that the algorithm needs fewer operations compared with other algorithms. Statistical analysis, sensitivity of secret key and differential attack analysis prove that the algorithm has higher safety and effectiveness.

关 键 词：图像加密 DNA合成图像 编码规则 密钥敏感度 攻击分析 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]