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车联网中基于区块链的分布式信任管理方案 被引量:2

Distributed trust management scheme based on blockchain in Internet of vehicles
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摘要 针对车联网中恶意车辆识别效率低、识别准确率低带来的安全问题,提出了一种基于区块链的分布式车联网信任管理方案。通过聚合车辆的评分信息,结合贝叶斯推理模型设计了一种虚假信息识别策略。联合车辆历史交互信息以及交通事件信息设计了一种声誉值更新算法,并利用声誉阈值识别恶意车辆。通过路边单元构建区块链,实现了交通数据以及车辆声誉值的分布式存储。改进了传统的工作量证明共识机制,通过事件等级与参与评分车辆数量动态改变矿工节点的出块难度,并利用等待机制使近期出块的节点暂时停止参与矿工节点的选举过程,从而减少重复计算带来的资源消耗。仿真结果表明,所提方案能够有效识别虚假信息,抵御恶意车辆的欺骗行为,提升恶意车辆的识别效率,减少资源消耗,在车联网的分布式信任管理方面是有效可行的。 Aiming at the security problems caused by the low efficiency and accuracy of malicious vehicle identification in Internet of vehicles,a distributed trust management scheme based on blockchain in Internet of vehicles was proposed.A false information identification strategy was designed by aggregating the scoring information of vehicles,combined with Bayesian inference model.A reputation value updating algorithm was designed by combining the historical interaction information of vehicles and traffic information,malicious vehicles were identified by the reputation threshold.A blockchain was constructed roadside units to realize the distributed storage of traffic data and vehicle reputation values.The traditional proof of work consensus mechanism was improved to dynamically change the difficulty of miner node generating a block through the event level and the number of vehicles involved in scoring,and the waiting mechanism was used to temporarily stop the nodes that had recently blocked from participating in the election process of miner nodes,thus reducing the resource consumption caused by repeated calculations.The simulation results show that the proposed scheme can effectively identify false information,resist the deceptive behavior of malicious vehicles,improve the identification efficiency of malicious vehicles,reduce resource consumption,and is effective and feasible in distributed trust management for Internet of vehicles.
作者 张海波 曹钰坤 刘开健 王汝言 ZHANG Haibo;CAO Yukun;LIU Kaijian;WANG Ruyan(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Advanced Network and Intelligent Connection Technology Key Laboratory of Chongqing Education Commission of China,Chongqing 400065,China;Key Laboratory of Ubiquitous Sensing and Networking in Chongqing,Chongqing 400065,China)
出处 《通信学报》 EI CSCD 北大核心 2023年第5期148-157,共10页 Journal on Communications
基金 国家自然科学基金资助项目(No.61901071,No.62271094) 长江学者和创新团队发展计划基金资助项目(No.IRT16R72) 重庆市留创计划创新类基金资助项目(No.cx2020059)。
关键词 车联网 区块链 信任管理 声誉值 共识机制 Internet of vehicles blockchain trust management reputation value consensus mechanism
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