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攻击特征提取
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Knowledge represent is an important component in expert system. This paper describe the way on analysis and knowledge represent of signature of security faults.

知识表达是专家系统的一个重要环节。文中叙述了在构建漏洞知识库过程中 ,利用漏洞进行攻击的特征提取以及特征知识表达的方法

In terms of the concurrence of the network intrusion and the uncertainty of attack character extraction, fuzzy Petri nets to express attack knowledge and construct reasoning model are given. This model can reason parallelly to detect the concurrent attack, and avoid the complexity of traditional Petri net reasoning based on searching reachability set for the solution. The reasoning has some intelligence. The experiment proves the validity and efficiency.

根据网络攻击具有并发性,攻击特征的提取具有不确定性等特点,给出了采用模糊Petri网实现攻击知识的表达和入侵检测的推理模型。该模型解决了误用入侵检测系统中现有知识表示方法不能并行推理的问题,以及传统的基于Petri网可达图搜索求解导致模型描述复杂、推理缺少智能的问题。最后通过入侵实例验证了该模型的正确性和有效性。

For the globalization of network attack, intrusion detection systems (IDS) should protect not only a local sub-net, but the whole network environment. Therefore, an urgent requirement of open resources for intrusion detection is coming to being. An open signature database for IDS has been implemented in the effort of this paper, which includes more than 1200 effective signatures. In this paper, the Intrusion Signature Exchange Protocol (ISEP) is presented, which has been used by IDSes to update signatures from...

For the globalization of network attack, intrusion detection systems (IDS) should protect not only a local sub-net, but the whole network environment. Therefore, an urgent requirement of open resources for intrusion detection is coming to being. An open signature database for IDS has been implemented in the effort of this paper, which includes more than 1200 effective signatures. In this paper, the Intrusion Signature Exchange Protocol (ISEP) is presented, which has been used by IDSes to update signatures from the database in real time. Digital certificate and role-based access control technique involved in the system is described. Finally, in the case study of Nachi worm, the method of signature extraction is illustrated.

随着网络攻击的全球化,入侵检测系统要保护的不再是个别子网,而是整个的网络环境.由此,产生了对入侵检测开放式资源的迫切需求.本文的工作实现了一个开放式的网络攻击特征库系统,它包括了1200多条有效的攻击特征.本文设计并实现了用于攻击特征实时更新的攻击特征交换协议(ISEP),并描述了其中基于数字证书和角色的访问控制技术.最后,通过Nachi蠕虫的实例说明了本特征库中攻击特征的提取方法.

 
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