一种定量划分网络信息系统安全域的方法

针对网络信息系统中对不同信息系统进行安全域划分是一个机构对不同信息系统进行安全防护的重要依据的问题，提出一种划分复杂信息系统安全域的定量方法，介绍了该方法中元素及相关属性的定义以及实现步骤。以某公司信息系统的数据为例进行了定量计算，结果表明，应用该方法可以为在信息系统安全风险评估时划分安全域提供参考。

Quantitative Method of Dividing Security Domains of Network Information System

The complexity and multilevel of the network has emerged more and more in the modern corporation and administration department.each information system has its important level in a department network system,so the security division of information system is an evidence to protect the various of information system in a department.This paper proposes a quantitative method to divide a complex information system by risk evaluation experience of some system,and applies this method in the risk evaluation progress.