Abstract: Aiming at the problem that the existing network threat situation assessment method is coarse and can not meet the requirements of different managers, a fine grained network threat situation assessment method is proposed. According to the evaluation strategy from local to whole, from microcosmic to macroscopic, this paper assesses the threat node, the threat link, the threat path, the threat target and the whole network threat situation, which realizes the network threats in-depth analysis and fine-grained evaluation. The experimental analysis proves the rationality and accuracy of assessment results.

Key words: network threat, situation assessment, fine-grained, model

摘要： 针对现有网络威胁态势评估方法评估粒度较粗，无法满足不同管理人员评估需求的问题，提出了一种细粒度的网络威胁态势评估方法。按照从局部到整体、从微观到宏观的评估策略，分别对威胁节点、威胁链路、威胁路径、威胁目标和全网威胁态势进行评估，实现了对网络威胁的深入分析和细粒度评估，通过实验分析证明了评估结果的合理性和准确性。

关键词: 网络威胁, 态势评估, 细粒度, 模型