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arXiv 1709.07567cs.CR
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网络入侵检测的随机工具

Stochastic Tools for Network Intrusion Detection

Lu Yu, Richard R. Brooks

摘要:

随着互联网的迅速发展和网络犯罪的急剧增加,网络安全问题变得越来越重要,受到了广泛的关注。我们将安全问题建模为随机系统。这使我们能够找到现有安全系统的弱点并提出新的解决方案。探索现有安全工具的漏洞可以防止网络攻击利用系统的弱点。我们提出了一个混合的网络安全方案,包括入侵检测系统(IDS)和蜜罐分散在整个网络。这结合了两种安全技术的优势。蜜罐是一种基于主动的网络安全系统,可以作为入侵检测系统被动检测策略的逻辑补充。这种集成迫使我们通过为拟议系统安排设备活动来平衡安全性能与成本。通过将调度问题制定为分散的部分可观察马尔可夫决策过程(DEC-POMDP),在每个设备处以分布式方式做出决策,而不需要集中控制。部分可观测马尔可夫决策过程(POMDP)是控制随机系统的一种有效方法。作为两个马尔可夫模型的组合,POMDP结合了隐马尔可夫模型(HMM)(捕获依赖于未观察状态的动态)和马尔可夫决策过程(MDP)(考虑决策方面)的优势。不确定性下的决策在商业和科学的许多领域都有应用,本文使用安全工具,采用平均代价准则的有限空间POMDPs的高质量近似解,并将其扩展到DEC-POMDPs。我们展示了如何使用这个工具来设计一个网络安全框架。

英文摘要:

With the rapid development of Internet and the sharp increase of network crime, network security has become very important and received a lot of attention. We model security issues as stochastic systems. This allows us to find weaknesses in existing security systems and propose new solutions. Exploring the vulnerabilities of existing security tools can prevent cyber-attacks from taking advantages of the system weaknesses. We propose a hybrid network security scheme including intrusion detection systems (IDSs) and honeypots scattered throughout the network. This combines the advantages of two security technologies. A honeypot is an activity-based network security system, which could be the logical supplement of the passive detection policies used by IDSs. This integration forces us to balance security performance versus cost by scheduling device activities for the proposed system. By formulating the scheduling problem as a decentralized partially observable Markov decision process (DEC-POMDP), decisions are made in a distributed manner at each device without requiring centralized control. The partially observable Markov decision process (POMDP) is a useful choice for controlling stochastic systems. As a combination of two Markov models, POMDPs combine the strength of hidden Markov Model (HMM) (capturing dynamics that depend on unobserved states) and that of Markov decision process (MDP) (taking the decision aspect into account). Decision making under uncertainty is used in many parts of business and science.We use here for security tools.We adopt a high-quality approximation solution for finite-space POMDPs with the average cost criterion, and their extension to DEC-POMDPs. We show how this tool could be used to design a network security framework.

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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