基于Tent和Bernouli映射的改进AES算法

An improved AES algorithm based on Tent mapping and Bernoulli mapping

随着加密算法被广泛应用,高级加密标准(Advanced Encryption Standard,AES)轮密钥之间具有强关联性的缺点也被发现.提出了一种基于Tent映射和Bernouli映射的改进AES算法,使用两种混沌映射产生的随机序列生成轮密钥,对原始的密钥扩展算法进行改进和优化,该方法生成的轮密钥之间无关联性,密钥空间足够大,并且每次生成的序列及轮密钥都不同,增强了AES抵御攻击的能力.通过对随机序列的安全测试分析,表明改进后的AES能够保证密钥扩展算法有足够的安全性,解决了轮密钥关联性的问题,并实现了一次一密的效果.

As encryption algorithms are widely used,the drawback of strong correlation between advanced encryption standard(AES)round keys has been discovered.An improved AES algorithm based on Tent mapping and Bernouli mapping is proposed,which uses the random sequences generated by the two chaotic mappings to generate round keys,and improves and optimizes the original key expansion algorithm.There is no correlation between the round keys generated by this method,and the key space is very large.The sequences and round keys generated each time are different,which enhances the ability of AES to resist attacks.Through security testing and analysis of random sequences,it was found that the improved AES can ensure the key expansion algorithm has enough security,solves the problem of round key correlation,and achieves the effect of one secret at a time.