基于网络系统的安全需求,针对树形网络拓扑结构,提出一种网络系统危险指数的计算方法.根据各节点存在的漏洞,用优劣解距离法(TOPSIS)可以得出各节点的危险指数,结合其在系统中所占的权重,计算出整个网络系统的危险指数,为安全事件的提前防御和后期补救工作提供参考.%For the security requirements of the network system and tree network topology structure,a risk index calculation method of network system is put forward. According to the loopholes existing in each node,a technique for order preference by similarity to an ideal solution(TOPSIS)method is used to get the risk index of each node. The weight of the risk index is com-bined in the system to calculate the risk index of the whole network system. The method provides a reference for advance de-fense and late remedy of security incidents.
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