问题 单项选择题

在分布式环境中实现身份认证可以有多种方案,以下选项中最不安全的身份认证方案是______。

A.用户发送口令,由通信对方指定共享密钥

B.用户发送口令,由智能卡产生解密密钥

C.用户从KDC获取会话密钥

D.用户从CA获取数字证书

答案

参考答案:A

解析: 口令明码发送,当然最不安全。

阅读理解

阅读短文, 根据短文内容完成句子。每空一词,并将单词写在相应的横线上。(满分10分)

Two famous cartoons

The Lion Kings

Mufasa , the king of the lions , has a baby son called Simba .Mufasa has a brother , Scar , who hates Simba and his father because he wants to be king . With the help of some hyenas Simba(土狼).Scar kills Mufasa , but very cleverly makes Simba believe that he killed his father .

Simba leaves and goes far away and Scar becomes king . But as Simba becomes older , he understands what really happened , and returns home with his friends . He fights Scar and becomes king of the lions .

Shrek

Farquaad , the ruler of a country called Duloc , decides that all the characters from fantasy stories must leave the country . There is a a very big , ugly monster called Shrek who lives in a forest and all the fantasy characters hide in his home , although Shrek doesn’t want them to .

Shrek visits Farquaad . Farquaad agrees that the fantasy characters can come back if Shrek can find the beautiful princess (公主)that Farquad wants to marry .Shrek goes to look for the princess called Fiona . He finds her and discovers that at night she becomes as ugly as him .When Farquaad discovers that Fiona is ugly , he doesn’t want to marry her . The monster and the princess marry , and the princess(公主)decides to stay ugly all the time for love !

阅读短文,根据短文内容完成句子。(每空一词,共10分)

小题1:Mufasa’s son is called ______________.

小题2:Scar ________ Simba and his father because he wants to be __________ of the lions.

小题3:Simba goes back home and fights Scar when he _______ _________.

小题4:Shrek ,a very big, ugly _______, visits Farquaad because he wants to help all the ________     _____.

小题5:Farquaad wants to ________ the beautiful princess called Fiona.

小题6:At last the princess and Shrek gets married for _______.

单项选择题