一种应用于IC卡数据加密的Rijndael改进算法  

Improvement on Rijndael Algorithm for IC Card Application

作　　者：陈作新[1] 刘鸿雁[1] 

机构地区：[1]鞍山科技大学计算机科学与工程学院,鞍山114044

出　　处：《计算机工程》2005年第1期155-156,183,共3页Computer Engineering

摘　　要：经对Rijndael算法研究发现,其密文长度通常大于明文长度,且运算时间复杂度较高,不便于对IC卡的数据进行加密。按照IC卡数据加密的实际需求,提出了一种基于Rijndael算法的改进算法。改进的新算法通过用动态密码对明文修补,实现密文与明文的长度相同;通过改进密鈅扩展算法,保障新算法安全;通过减少加密轮次,降低其时间复杂度,从而使其在IC卡数据加密系统中的应用可行。Research on Rijndael algorithm reveals that the enciphered text length is larger than that of the plain text with high time complexity, which is inconvenient for data encryption in IC card application. According to the requirements of IC card application, this paper proposes an improvement on Rijndael algorithm. The improved algorithm is applicable in IC card data encryption through length equalization by patching on the plain text with dynamic cipher, safety guarantee by extended key schedule algorithm, and time complexity reduction by degrading the number of encrypting rounds.

关 键 词：IC卡 加密 RIJNDAEL 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]