计算机科学 ›› 2024, Vol. 51 ›› Issue (4): 381-387.doi: 10.11896/jsjkx.230900057
李凤云1,2, 陈明明2, 王林2, 李朋3, 鞠献银3
LI Fengyun1, CHEN Mingming2, WANG Lin2, LI Peng3 , JU Xianyin3
摘要: 随着自动驾驶和智慧交通系统的发展,车联网技术发挥出了更加重要的作用。车联网是一个开放式的访问环境,这使得如何确保消息可靠、车辆可信等问题成为重大安全挑战。基于此,在已有基于区块链信任管理方案的基础上,重新设计车联网信任管理框架,以弥补现有解决方案存在的可扩展差、共识算法效率低等问题。框架主要由消息信任评估、车辆信任更新和信任区块的创建与共识3个模块组成。在消息信任评估模块中,为识别恶意节点的虚假消息,基于车辆实体的直接信任和邻居车辆的间接信任综合评估消息的可信度。在车辆信任更新模块,为有效抑制车辆的恶意行为,根据消息评估结果和车辆的历史行为对车辆信任进行调整。在区块创建与共识模块中,基于事件重要性和区块链的扩展能力,提出了基于重要性证明的优化共识算法。最后,通过仿真实验验证了框架的可用性,对比实验结果表明所提算法在可扩展性和鲁棒性方面均有显著的提升。
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