昆明理工大学 信息工程与自动化学院,云南 昆明 650500
刘 云,男,副教授,现从事数据挖掘、深度学习等方向研究。 E-mail:liuyun@kmust.edu.cn
E-mail: 2867328528@qq.com
收稿:2021-05-06,
纸质出版:2022-02-24
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刘云,郑文凤,张轶.卡方校正算法对入侵检测特征选择的优化[J].武汉大学学报(理学版),2022,68(1):65-72.
LIU Yun,ZHENG Wenfeng,ZHANG Yi.Optimization of Chi-Square Correction Algorithm for Intrusion Detection Feature Selection [J].J Wuhan Univ (Nat Sci Ed),2022,68(1):65-72. DOI:10.14188/j.1671-8836.2021.0111(Ch).
刘云,郑文凤,张轶.卡方校正算法对入侵检测特征选择的优化[J].武汉大学学报(理学版),2022,68(1):65-72. DOI:10.14188/j.1671-8836.2021.0111
LIU Yun,ZHENG Wenfeng,ZHANG Yi.Optimization of Chi-Square Correction Algorithm for Intrusion Detection Feature Selection [J].J Wuhan Univ (Nat Sci Ed),2022,68(1):65-72. DOI:10.14188/j.1671-8836.2021.0111(Ch). DOI:
在入侵检测系统中互信息特征选择标准可快速选择重要特征,通常信息熵的计算偏差会降低系统的分类性能。为了减少特征选择偏差的影响,提出卡方校正算法(chi-square correction algorithm,CSCA)。首先,对所有候选特征进行离散化处理,计算互信息特征选择相关标准的偏差;然后,将偏差项添加在特征选择目标函数中,通过CSCA优化离散化水平和特征偏差;最后,在更新后的特征集中选择当前最重要的特征子集,在分类模型中检测攻击。仿真结果表明,与MIGM(mutual information gain maximize)算法和M-DFIFS(M-dynamic feature importance based feature selection)算法相比,卡方校正算法提高了入侵检测系统的精度,同时降低了系统的误报率。
Mutual information feature selection criteria can be used in intrusion detection systems to quickly select important features. Usually
the calculation deviation of information entropy will reduce the classification performance of the system. In order to reduce the influence of feature selection deviation
a chi-square correction algorithm(CSCA) is proposed. First
we discretize all candidate features and calculate the deviation of the relevant criteria for mutual information feature selection; secondly
we add the deviation term to the feature selection objective function
and optimize the discretization level and feature deviation through the CSCA; finally
in the updated feature set
the most important feature subset is selected to detect attacks in the classification model. The simulation results show that
compared with the MIGM(mutual information gain maximize) algorithm and the M-DFIFS(M-dynamic feature importance based feature selection) algorithm
the chi-square correction algorithm improves the accuracy of the intrusion detection system and reduces the false alarm rate of the system.
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