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arXiv 2202.04620cs.CR
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IoTMonitor:一种基于隐马尔可夫模型的安全系统,用于识别触发动作IoT平台中的关键攻击节点

IoTMonitor: A Hidden Markov Model-based Security System to Identify Crucial Attack Nodes in Trigger-action IoT Platforms

Md Morshed Alam, Md Sajidul Islam Sajid, Weichao Wang, Jinpeng Wei

摘要:

随着物联网环境中智能操作平台的出现和快速发展,物联网设备之间的交互导致的安全漏洞变得越来越普遍。在一个设备上发生的事件触发另一个设备中的动作,这可能最终有助于在网络中创建事件链。攻击者利用链效应来危害物联网设备,并通过将恶意事件注入链中来远程触发感兴趣的操作。为了解决由攻击者动作场景引起的安全漏洞,现有的研究工作集中在基于设备上的物理指纹来验证设备的安全属性或验证某些事件的发生。我们提出了IoTMonitor,这是一种安全分析系统,它通过观察传感器收集的一系列物理证据来识别最高可能性的事件发生的底层链。我们使用Baum-Welch算法来估计转移和发射概率,并使用Viterbi算法来识别事件序列。然后,我们可以识别出攻击者动作序列中的关键节点,这些节点的妥协使攻击者能够达到他们的最终目标。在PEEVES数据集上的实验结果表明,该系统能够从观测数据中高精度地重建事件发生序列,并识别出攻击路径上的关键节点。

英文摘要:

With the emergence and fast development of trigger-action platforms in IoT settings, security vulnerabilities caused by the interactions among IoT devices become more prevalent. The event occurrence at one device triggers an action in another device, which may eventually contribute to the creation of a chain of events in a network. Adversaries exploit the chain effect to compromise IoT devices and trigger actions of interest remotely just by injecting malicious events into the chain. To address security vulnerabilities caused by trigger-action scenarios, existing research efforts focus on the validation of the security properties of devices or verification of the occurrence of certain events based on their physical fingerprints on a device. We propose IoTMonitor, a security analysis system that discerns the underlying chain of event occurrences with the highest probability by observing a chain of physical evidence collected by sensors. We use the Baum-Welch algorithm to estimate transition and emission probabilities and the Viterbi algorithm to discern the event sequence. We can then identify the crucial nodes in the trigger-action sequence whose compromise allows attackers to reach their final goals. The experiment results of our designed system upon the PEEVES datasets show that we can rebuild the event occurrence sequence with high accuracy from the observations and identify the crucial nodes on the attack paths.

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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