超混沌与AES的混合加密算法

Hybrid encryption algorithm based on hyperchaos and AES

为保障数据的机密性,防止数据被窃听、非授权访问,把超混沌系统的复杂动力学特性与高级加密标准(AES)相结合,设计一种超混沌和AES的混合加密算法,并利用MATLAB编程实现。对2个超混沌系统产生的混沌序列进行处理,生成加密密钥,明文数据经过超混沌加密和AES加密后输出密文。实验结果表明,该算法的密钥长度达654 bit,且密钥空间还有进一步扩大的可能,具有良好的密文统计特性和密钥敏感性,任何一个密钥参数发生超过10-15的变化后都无法正确解密出原始明文。

Combining the complex dynamic characteristics of the hyperchaotic system with the Advanced Encryption Standard(AES),a hybrid encryption algorithm based on hyperchaos and AES is designed and realized by MATLAB in order to ensure data confidentiality and to prevent data from interception and unauthorized access.The chaotic sequences generated by the two hyperchaos were processed to create encryption keys and the plaintext data was encrypted with hyperchaos encryption and AES encryption to output the ciphertext.The experimental results show that the algorithm has a key length of 654 bit,and the key space has the possibility of further expansion.The algorithm has good ciphertext statistical characteristics and key sensitivity,thus any key parameter change more than 10-15 can′t correctly decrypt the original plaintext.