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【单选题】
PKI体系能够实现数据的机密性、完整性和有效性,下面有关这些特性的描述正确的是( )。
A.
数据的机密性是指数据在传输过程中不能被非法篡改
B.
数据的完整性是指数据不能被随便否认
C.
数据的有效性是指数据在传输过程中不能被非法授权者偷看
D.
数据的有效性是指数据不能被随便否认
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