Abstract: Although mixcolumn transformation of AES algorithm has the best diffusion features，its efficiency of circuit implementation is far different from that of inverse column transformation.By investigating the procedure of AES mixcolumn transformation，a number of new mixcolumn transformations are proposed according to characteristics of circuit implementation，in which encryption and decryption implementation may use the same circuits.While retaining the best diffusion features，the new kind of mixcolumn transformation obtains almost the same cost and efficiency as that in AES.

摘要： AES算法的列混合变换具有最优的扩散特性，但它与逆列混合变换的硬件电路实现效率相差较大。通过分析AES算法列混合变换，根据电路实现特点，给出了一批加解密可以共用电路的列混合变换，在保持最优扩散性质的同时，新的列混合变换电路资源开销与效率同AES算法相当。