【摘要】 为增强消息认证码(MAC)算法的安全性,将Rijndael作为消息认证码的反馈分组加密算法,取代原有的DES。该算法用Logistic映射初值作为种子密钥生成混沌序列,对该序列进行域值量化得到二进制密钥流,对其分组作为Rijndael算法的初始密钥,给出了改进型MAC算法模型,经分析可知,该算法减少了密钥种子字节数,实现了一次一密,增加了攻击MAC的困难程度,可以提供更安全的认证功能。更多还原

【Abstract】 In order to strengthen the security of Message Authentication Code(MAC) algorithm,Rijndael algorithm is applied as the feedback and block encryption algorithm of MAC instead of the DES.By using initial values of Logistic Map as the CipherKey seeds to create chaotic sequences and then carrying on quantification with its proper region value,the binary system CipherKey streams can be obtained.The initial CipherKey of Rijndael can be produced by dividing the binary streams into groups.The improved MAC algorithm model is described.By analysis,the number of bytes of Rijndael CipherKey seeds is decreased,one-time-pad is realized with the algorithm.It can offer safer authentification and make attacking of MAC more difficult.更多还原