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United We Stand: Intrusion Resilience in Mobile Unattended WSNs

机译:United We Stand:移动无人值守的无线传感器网络中的入侵防御能力

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Wireless Sensor Networks (WSNs) are susceptible to a wide range of attacks due to their distributed nature, limited sensor resources, and lack of tamper resistance. Once a sensor is corrupted, the adversary learns all secrets. Thereafter, most security measures become ineffective. Recovering secrecy after compromise requires either help from a trusted third party or access to a source of high-quality cryptographic randomness. Neither is available in Unattended Wireless Sensor Networks (UWSNs), where the sink visits the network periodically. Prior results have shown that sensor collaboration is an effective but expensive means of obtaining probabilistic intrusion resilience in static UWSNs. In this paper, we focus on intrusion resilience in Mobile Unattended Wireless Sensor Networks ($(mu UWSNs)$), where sensors move according to some mobility models. Note that such a mobility feature could be independent from security (e.g., sensors move to improve area coverage). We define novel security metrics to evaluate intrusion resilience protocols for sensor networks. We also propose a cooperative protocol that—by leveraging sensor mobility—allows compromised sensors to recover secure state after compromise. This is obtained with very low overhead and in a fully distributed fashion. Thorough analysis and extensive simulations support our findings.
机译:无线传感器网络(WSN)由于其分布式特性,有限的传感器资源以及缺乏防篡改功能,因此容易受到广泛的攻击。一旦传感器损坏,对手就会了解所有秘密。此后,大多数安全措施都失效了。折衷后恢复保密需要来自受信任的第三方的帮助或访问高质量密码随机性的来源。无人值守无线传感器网络(UWSN)中均不可用,其中接收器定期访问网络。先前的结果表明,传感器协作是在静态UWSN中获得概率入侵恢复能力的有效但昂贵的手段。在本文中,我们专注于移动无人值守无线传感器网络($(mu UWSNs)$)中的入侵弹性,其中传感器根据某些移动性模型移动。注意,这种移动性特征可以独立于安全性(例如,传感器移动以改善区域覆盖范围)。我们定义了新颖的安全指标来评估传感器网络的入侵弹性协议。我们还提出了一种协作协议,该协议通过利用传感器的移动性,允许被破坏的传感器在受到破坏后恢复安全状态。这是通过非常低的开销和完全分布式的方式获得的。全面的分析和广泛的模拟支持了我们的发现。

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