基于DNA编码及整数混沌的彩色图像加密算法研究  

Research into Color Image Encryption Algorithm Based on DNA Coding and Integer Chaos

作　　者：陈飞 徐嘉俊 王嘉欣 CHEN Fei;XU Jiajun;WANG Jiaxin(The 723 Institute of CSSC,Yangzhou 225101,China)

机构地区：[1]中国船舶集团有限公司第七二三研究所,江苏扬州225101

出　　处：《舰船电子对抗》2024年第1期84-88,共5页Shipboard Electronic Countermeasure

摘　　要：数字图像具有相邻像素相关性强,冗余度高等特点。打破数字图像相邻像素的相关性,提高密文图像及密钥是目前图像加密方案的研究热点。针对上述问题,设计了一种基于Tent映射及DNA编码的图像加密方案。该方案先利用猫映射及Zigzag变换对图像进行二次置乱,打破明文图像相邻像素之间的相关性。其次利用二维整数Tent映射生成的伪随机序列对置乱图像加密。DNA编码规则有8种,利用Tent映射生成的伪随机序列作为选取DNA编码规则的参数,最终形成密文图像。从直方图、信息熵等方面进行分析,结果表明该方案密码学特性强、安全性高。Digital images have the characteristics of strong correlation between adjacent pixels and high redundancy.Breaking the correlation between adjacent pixels of digital image and improving the cipher text images and keys are the hot topic of image encryption schemes at present.To solve the above problems,this paper designs an image encryption scheme based on Tent mapping and DNA coding.In this scheme,Arnold mapping and Zagzig transform are firstly used to scramble the image twice to break the correlation between adjacent pixels of the clear text image.Secondly,the scrambled image is encrypted by using the pseudo-random sequence generated by two-dimensional integer Tent mapping.There are eight kinds of DNA coding rules.The pseudo-random sequence generated by Tent mapping is used as the parameter to select the DNA coding rules and finally the ciphertext image is formed.From the aspects of histogram and information entropy,etc.,the results show that the scheme has strong cryptographic characteristics and high security.

关 键 词：TENT映射 DNA编码 二次置乱 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]