基于分数阶陈氏混沌系统的图像加密算法  

Image encryption algorithm based on fractional-order Chen chaotic system

作　　者：王雅庆[1] 周尚波[1,2] 

机构地区：[1]重庆大学计算机学院,重庆400044 [2]重庆市计算机网络与通信技术重点实验室,重庆400030

出　　处：《计算机应用》2013年第4期1043-1046,共4页journal of Computer Applications

基　　金：国家自然科学基金资助项目(60873200,61174025);中央高校基本科研业务费资助项目(CDJXS10181132)

摘　　要：由于分数阶混沌动力学系统比整数阶系统具有更复杂的动力学特性,且能为图像加密方案提供更多的自由度,基于分数阶陈氏混沌系统,提出了一种图像加密方法。在发送端,驱动系统产生混沌信号,利用混沌信号扰乱明文图像的像素位置,将扰乱后的图像掩盖在混沌信号中,得到传输的密文图像。在接收端,通过同步系统去掩盖,进行像素位置扰乱的逆操作,恢复明文图像。最后对提出的加密算法进行了安全性分析。实验结果表明,该加密算法安全性高,具有良好的研究价值和应用前景。In this paper,a new image encryption algorithm was presented based on the fractional-order Chen chaotic system,for fractional-order chaotic dynamical systems have more complex dynamical behaviors than those of integer-order systems and can provide more freedom for image encryption schemes.In the transmitter,the positions of the image pixels were scrambled by the chaotic signal generated by the driving system firstly.Then the disturbed image was embedded into the chaotic signal and the encrypted image for transmission was obtained.In the receiver,the chaotic signal was removed by the synchronization system.Then the inverse process of pixel scrambling was carried out and the original image was recovered.The security of the proposed algorithm was analyzed in the end.The experimental results demonstrate that the encryption algorithm is of high security and has good research value and application prospects.

关 键 词：分数阶陈氏系统 混沌 同步 图像加密 安全性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TP391.41[自动化与计算机技术—计算机科学与技术]