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arXiv 1606.09042cs.CR
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动态风险评估的贝叶斯攻击模型

Bayesian Attack Model for Dynamic Risk Assessment

Aguessy François-Xavier, Bettan Olivier, Blanc Grégory, Conan Vania, Debar Hervé

摘要:

由于高级多步攻击的威胁,安全运营商在部署补救措施时通常很难完全覆盖所有漏洞。部署传感器来监测利用剩余漏洞的攻击是不够的,需要新的工具来评估与这些传感器产生的安全事件相关的风险。虽然攻击图被提出来表示信息系统中发生的已知多步攻击,但它们并不直接适用于动态风险评估。在本文中,我们提出了贝叶斯攻击模型(BAM),一个基于贝叶斯网络的拓扑攻击图的扩展,能够处理拓扑循环,使其适合于任何信息系统。对实际拓扑进行评估,以研究其概率参数的敏感性。

英文摘要:

Because of the threat of advanced multi-step attacks, it is often difficult for security operators to completely cover all vulnerabilities when deploying remediations. Deploying sensors to monitor attacks exploiting residual vulnerabilities is not sufficient and new tools are needed to assess the risk associated to the security events produced by these sensors. Although attack graphs were proposed to represent known multi-step attacks occurring in an information system, they are not directly suited for dynamic risk assessment. In this paper, we present the Bayesian Attack Model (BAM), a Bayesian network-based extension to topological attack graphs, capable of handling topological cycles, making it fit for any information system. Evaluation is performed on realistic topologies to study the sensitivity of its probabilistic parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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