请看我对这个问题的评论：做什么你的意思是怎么样？您可以查看算法的描述，理解它，然后做一些工作来实现它：

http://en.wikipedia.org/wiki/International_Data_Encryption_Algorithm [ ^ ]。



没有人能够理解它，通常是人们自己做。 :-)

-SA

Please see my comment to the question: what do you mean "how"? You can look at the description of the algorithm, understand it, and then do some work to implement it:
http://en.wikipedia.org/wiki/International_Data_Encryption_Algorithm[^].

Nobody can put understanding of it in your head, usually people do it by themselves. :-)

—SA