基于超混沌AES图像加密算法

为提高图像加密算法的安全性能, 提出了一种改进的AES（Advanced Encryption Standard）超混沌加密算法。该算法根据超混沌系统产生的混沌序列进行排列组成S盒, 对明文图像做像素值替换；利用加入外部密钥的混沌序列分别对图像像素点进行行、 列位置置乱, 并对加密算法的安全性能进行了深入分析。仿真实验结果表明, 该算法具有更高的系统安全性, 不仅具有较大的密钥空间和较高的密钥敏感性, 而且能有效抵抗统计攻击和差分攻击等。

AES Image Encryption Algorithm Based on Hyper-Chaos

In order to improve the safety of image encryptionalgorithm, an improved hyperchaotic AES (Advanced Encryption Standard) encryption algorithm which improved the generation method of S box is proposed. The method arranged chaotic sequence generated by hyperchaotic system to form the S box,replaced pixels to plaintext. Chaos sequence is used to scramble the location of row and column based on external key. Safety performance of encryption algorithm is deeply analysed, the simulation results show that the proposed algorithm has much higher security level, the algorithm not only has larger key space and higher key sensitivity, but also can effectively resist attacks, such as statistics attack and differential attack.