信息系统面临多种类型的网络安全威胁。其中，信息泄露是指信息被泄露或透露给某个非授权的实体；（）是指数据被非授权地进行增删、修改或破坏而受到损失；（）是指对信息或其他资源的合法访问被无条件地阻止；（作答此空）是指通过对系统进行长期监听，利用统计分析方法对诸如通信频度、通信的信息流向、通信总量的变化等参数进行研究，从而发现有价值的信息和规律。
- A.特洛伊木马
- B.业务欺骗
- C.物理侵入
- D.业务流分析
正确答案及解析
正确答案
解析
欺诈者采用某种手段欺骗合法的用户或系统自愿地放弃敏感信息等。
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