基于选择空间的AES密钥扩展算法

A new AES key expansion algorithm based on choice space

传统AES密钥扩展算法在已知某轮子密钥的情况下容易遭受攻击,为了避免这种情况的发生,通过采用单向性思路,使用轮密钥常驻内存的工作方式以提高数据吞吐率,并提出基于选择空间的AES密钥扩展算法,对原有算法的加密强度进行了改善。通过FPGA仿真实现,实验结果表明,该方法既能保证密钥扩展算法的安全性,亦能充分结合FPGA设计高效并行的特点,提高其运行效率。

Traditional AES encryption key expansion algorithm is vulnerable to attack under the condition of the round key revealed. In order to avoid this situation,according to the idea of one-way property,the permanent round key memory mecha-nism is adopted to efficiently improve the data throughout rate. An AES encryption expansion algorithm based on selection space is proposed for improving the strength of the traditional encryption. The experiment results on FPGA simulation platform show that the proposed algorithm can both guarantee the security of encryption keys and utilize the high parallelism of FPGA to im-prove its running efficiency.