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Secure Synchronization of Periodic Updates in Ad Hoc Networks

机译:Ad Hoc网络中定期更新的安全同步

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摘要

We present techniques for synchronizing nodes that periodically broadcast content and presence updates to colocated nodes over an ad hoc network, where nodes may exhibit Byzantine malicious behavior. Instead of aligning duty cycles, our algorithms synchronize the periodic transmissions of nodes. This allows nodes to save battery power by switching off their network cards without missing updates from their neighbors. We propose several novel attack classes and show that they are able to disrupt synchronization even when launched by a single attacker. Finally, we devise a rating based algorithm (RBA) that rates neighbors based on the consistency of their behavior. By favoring well-behaved nodes in the synchronization process, we show that RBA quickly stabilizes the synchronization process and reduces the number of lost updates by 85 percent. Our evaluation also shows that all our algorithms are computationally efficient and, for the setup considered, extend the device lifetime by 30 percent over an always-on Wi-Fi scenario.
机译:我们介绍了一些用于同步节点的技术,这些节点通过ad hoc网络定期向同位节点广播内容和状态更新,其中节点可能表现出拜占庭的恶意行为。我们的算法无需对齐占空比,而是同步节点的定期传输。这使节点可以通过关闭网卡来节省电池电量,而不会丢失邻居的更新。我们提出了几种新颖的攻击类别,并显示了它们即使在由单个攻击者启动时也能够破坏同步。最后,我们设计了一种基于评级的算法(RBA),该算法根据邻居行为的一致性对邻居进行评级。通过在同步过程中偏爱表现良好的节点,我们表明RBA可以快速稳定同步过程,并将丢失的更新数量减少85%。我们的评估还显示,我们的所有算法在计算效率上都非常高,并且对于考虑的设置而言,在始终在线的Wi-Fi情况下,设备的使用寿命可延长30%。

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