浅谈DES算法

Superficial Discussion of the DES Algorithm

DES算法即数据加密算法 ,该算法从初始变换开始 ,再经 1 6轮迭代运算 ,最后经逆初始变换而结束 .在考虑DES的安全性问题时 ,算法设计、迭代的数目、密钥长度均是必须重视的 .DES存在与补码及密钥选择有关的弱点 ,也存在设计等方面的弱点 .

The DES algorithm,ie,Data Encryption Standard algorithm.The algorithm begins with an initial permutation,then after 16 substitution-permutation rounds,it finishes with an inverse initial permutation.When we consider the questions about the security of the DES,the design of the algorithm,number of iterations and key length all should be attached importance.The DES has weaknesses that concerns complements and choice of keys,so do in design.