基于混沌映射和AES算法的图像加密方案  

Image Encryption Scheme Based on AES and Chaotic Series Encryption

作　　者：肖慧娟[1] 丘水生[1] 邓成良[2] 

机构地区：[1]华南理工大学电子与信息工程学院 [2]东莞理工学院电子工程系,东莞523808

出　　处：《计算机工程》2007年第23期154-155,172,共3页Computer Engineering

基　　金：广东省自然科学基金资助项目(06026809)

摘　　要：提出了一种对图像信号进行时空两级加密的方法。在时序加密级,采用混沌序列作为AES加密的初始密钥,既保留了AES作为常规加密算法的优良特性,又方便了密钥的产生和管理。在空间置换加密级,给出了一种将混沌序列转换为空间置换矩阵的新方法。混沌序列由参数受调的logistic映射产生,避免了混沌迭代进入短周期效应。实验结果表明加密图像效果良好,解密图像无损伤。This paper presents a composite spatial-temporal approach to image encryption. In the temporal domain, chaotic series acts as a key for the AES encryption. It generates and administers its key without compromising any of its nice features. In the spatial domain, the paper presents a new way of deriving a space transform matrix by chaotic series. The chaos series is generated by the logistic equation, whose parameters are modulated. Therefore, short cycles axe avoided in the solution sequence of the chaotic system. Experimental results confirm the effectiveness of the proposed method. Also, there is no damage to the decrypted image.

关 键 词：AES加密 LOGISTIC混沌序列 图像置换 图像加密 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]