【摘要】 研究了DES算法用差分分析法易破译和3-DES算法效率低的弊端,提出了利用Rijn-dael算法来实现对任意文件的加密。该算法采用block结构和S-盒采用有限域GF(28)中的乘法逆运算,提高了安全性和效率。大量的测试结果表明,该算法与其他分组密码算法相比更安全、效率更高等特点。该文给出了DES算法的数学表达式。更多还原

【Abstract】 This paper researches the shortcomings of the insecurity based on differential cryptoanalysis of the DES and the inefficient 3-DES algorithm.A Rijndael algorithm is proposed to implement the encryption of any files in this paper.The block structure and the S-box of the algorithm take the multiplicative inverse in the finite domain GF(2~8)to improve the security and efficiency.A large number of tested results show that the Rijndael algorithm is more secure and effective.The paper also gives the mathematical expressions of the DES algorithm.更多还原