Abstract: Chinese Internet is facing increasingly serious security threat.In order to enhance the defense capabilities of existing networks，there is great need to study a scientific and rational method to evaluate the security situation of Internet in China timely.However，there has not yet a mature way in large-scale network security assessment at home and abroad.This paper presents a threat evaluation model for large-scale network based on A.J.Klee and fuzzy evaluation method.Experiments show that using this model can effectively assess the security threat status of large-scale network.

Key words: A.J.Klee, fuzzy evaluation method, large-scale network, threat evaluation

摘要： 我国互联网面临的安全威胁越来越严重，为提高现有网络的防御能力，有必要研究科学合理的方法来及时评估我国互联网的安全状况。目前国内外在大规模网络安全评估方面还没有比较成熟的方法，将古林法与模糊评判法结合用于网络安全威胁评估，提出了一个基于古林-模糊综合评判的大规模网络威胁评估模型。实验表明，使用该模型能有效评估大规模网络的安全威胁状况。

关键词: 古林法, 模糊评判法, 大规模网络, 威胁评估