计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (36): 12-14.DOI: 10.3778/j.issn.1002-8331.2009.36.004

• 博士论坛 • 上一篇    下一篇

AES扩散层的分析及改进方案设计

杨宏志,韩文报,沈 勇   

  1. 信息工程大学 信息工程学院,郑州 450002
  • 收稿日期:2009-09-24 修回日期:2009-10-26 出版日期:2009-12-21 发布日期:2009-12-21
  • 通讯作者: 杨宏志

Analysis and design of AES diffusion layer

YANG Hong-zhi,HAN Wen-bao,SHEN Yong   

  1. Institute of Information Engineering,Information Engineering University,Zhengzhou 450002,China
  • Received:2009-09-24 Revised:2009-10-26 Online:2009-12-21 Published:2009-12-21
  • Contact: YANG Hong-zhi

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。

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.

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