基于Julia集和DNA编码的彩色图像加密算法  

Color Image Encryption Algorithm Based on Julia Set and DNA Coding

作　　者：朱静 杭后俊 郭萍 程永建 吴亚玲 孙永妍 ZHU Jing;HANG Houjun;GUO Ping;CHENG Yongjian;WU Yaling;SUN Yongyan(School of Computer and Information,Anhui Normal University,Wuhu 241000)

机构地区：[1]安徽师范大学计算机与信息学院,芜湖241000

出　　处：《计算机与数字工程》2024年第8期2479-2483,2504,共6页Computer & Digital Engineering

基　　金：安徽省高等学校自然科学研究重点项目(编号:KJ2017A326)资助。

摘　　要：安全性在图像传输过程中至关重要,为了保证图像信息的安全传输,提出了一种基于Julia集和DNA编码的彩色图像加密算法,该算法使用边界具有混沌性的Julia集作为密钥,并使用幻方置乱对Julia集边界放大区域进行密钥转化,得到密钥图像,结合DNA随机编码对明文图像进行扩散,得到最终密文图像。Julia集密钥仅需要几个简单的参数生成,大大减少了密钥的存储空间。Julia集的混沌性使得密钥随参数的细微修改而发生明显变化,无法正常解密。DNA随机编码有效解决了单一编码方式易受明文攻击的问题。仿真结果表明,论文算法在密钥敏感性、信息熵、抗噪声和差分攻击等方面具有较高的安全性。Security is very important in the process of image transmission.In order to ensure the safe transmission of image information,a color image encryption algorithm based on Julia set and DNA coding is proposed.The algorithm uses Julia set with chaotic boundary as the key,and uses magic square scrambling to transform the key in the enlarged area of Julia set boundary to obtain the key image,combined with DNA random coding,the plaintext image is diffused to obtain the final ciphertext image.Julia set key only needs a few simple parameters to generate,which greatly reduces the storage space of the key.The chaos of Julia set makes the key change obviously with the slight modification of parameters,so it can not be decrypted normally.DNA random coding effectively solves the problem that a single coding method is vulnerable to plaintext attack.Simulation results show that the proposed algorithm has high security in key sensitivity,information entropy,anti noise and differential attack.

关 键 词：JULIA集 DNA编码 幻方 混沌 图像加密 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]