单选

●下面描述正确的是 (65) 。
(65)

A．数字签名技术用来保证数据在传输过程中的安全性 &n
bsp; B．数字信封技术用来保证数据在传输过程中的完整性
C．电子支票只要第二方认证就可以使用
D．以上都不对

试题出自试卷《2011年程序员考试考前密卷（六）-上午试题》

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●下面描述正确的是 (65) 。(65)

●下面描述正确的是 (65) 。
(65)