关于网络安全的描述,不正确的是( )。
- A.网络完全工具的每一个单独组织只能完成其中部分功能,而不能完成全部功能
- B.信息安全的基本要素有机密性、完整性、可用性
- C.典型的网络攻击步骤为:信息收集,试探寻找突破口、实施攻击、消除记录、保留访问权限
- D.只有得到允许的人才能修改数据,并且能够辨别出数据是否已被篡改,描述的是信息安全的可用性
正确答案及解析
正确答案
解析
信息安全的基本要素:
(1)机密性:确保信息不暴露给未授权的实体或进程。
(2)完整性:只有得到允许的人才能修改数据,并且能够判别出数据是否已被篡改。
(3)可用性:得到授权的实体在需要时可访问数据,即攻击者不能占用所有的资源而阻碍授权者的工作。
(4)可控性:可以控制授权范围内的信息流向及行为方式。
(5)可审查性:对出现的网络安全问题提供调查的依据和手段。
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