Secure Time Synchronization against Malicious Attacks for Wireless Sensor Networks

V. Vijayalakshmi, T. G. Palanivelu, N. Agalya
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引用次数: 4

Abstract

Wireless sensor networks (WSNs) have emerged as an interesting research area in the last few years. The applications envisioned for such networks require collaborative execution of a distributed task amongst a large set of sensor nodes. The collaborative execution is realized by exchanging messages that are time-stamped using the local clocks on the nodes. Hence, time synchronization becomes indispensable in such distributed systems. For years, protocols such as network time protocol (NTP) have kept the clocks of networked systems in perfect synchronization. However, wireless sensor networks has a large density of nodes and very limited energy resource at every node which leads to improved scalability requirements while limiting the resources. This paper proposes a technique called level-based time synchronization to provide redundant ways for each node to synchronize its clock with the common source, so that it can tolerate partially missing or false synchronization information provided by compromised nodes. The efficacy of this technique is evaluated via simulations.
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针对无线传感器网络恶意攻击的安全时间同步
无线传感器网络(WSNs)是近年来兴起的一个有趣的研究领域。为这种网络设想的应用程序需要在大量传感器节点之间协作执行分布式任务。协作执行是通过使用节点上的本地时钟交换带有时间戳的消息来实现的。因此,在这样的分布式系统中,时间同步变得必不可少。多年来,网络时间协议(NTP)等协议使网络系统的时钟保持完美同步。然而,无线传感器网络的节点密度大,每个节点上的能量资源非常有限,这导致在限制资源的同时提高了可扩展性要求。本文提出了一种基于层次的时间同步技术,为每个节点提供冗余的方式与公共源同步时钟,使其能够容忍受损节点提供的部分丢失或错误的同步信息。通过仿真对该技术的有效性进行了评价。
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