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Cooperative Message Authentication in Vehicular Cyber-Physical Systems

机译:车载网络物理系统中的协作消息认证

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The vehicular ad hoc network presents a very complex cyber-physical system with intricate interplay between the physical and cyber domains. In the physical domain, vehicles need to frequently broadcast their geographic information. The safety message broadcasting in an area with a high density of vehicles tends to incur a large data traffic rate that should be properly processed in the cyber domain. In this paper, we address the issue of large computation overhead caused by the safety message authentication. Especially, a cooperative message authentication protocol (CMAP) is developed to alleviate vehicles' computation burden. With CMAP, all the vehicles share their verification results with each other in a cooperative way, so that the number of safety messages that each vehicle needs to verify reduces significantly. Furthermore, we study the verifier selection algorithms for a high detection rate of invalid messages in a practical 2-D road scenario. Another important contribution in this paper is that we develop an analytical model for CMAP and the existing probabilistic verification protocol , considering the hidden terminal impact. Simulation results over a practical map are presented to demonstrate the performance of the proposed CMAP with comparison to the existing method.
机译:车辆自组织网络提供了一个非常复杂的网络物理系统,在物理域和网络域之间有着复杂的相互作用。在物理领域,车辆需要频繁广播其地理信息。在车辆密度高的区域中广播的安全消息往往会导致较大的数据流量,应在网络领域中对其进行适当处理。在本文中,我们解决了安全消息身份验证导致的大量计算开销的问题。特别地,开发了协作消息认证协议(CMAP)以减轻车辆的计算负担。借助CMAP,所有车辆以协作的方式相互共享其验证结果,从而大大减少了每辆车需要验证的安全消息的数量。此外,我们研究了在实际的二维道路场景中针对无效消息的高检测率的验证者选择算法。本文的另一个重要贡献是,我们考虑了隐藏的终端影响,为CMAP和现有的概率验证协议开发了一个分析模型。提出了在实际地图上的仿真结果,以证明与现有方法相比,所提出的CMAP的性能。

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