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Blockchain-based Authentication and Proof-of-Reputation Mechanism for Trust Data Sharing in Internet of Vehicles
Xiao Bai, Shanzhi Chen, Yan Shi, Chengzhi Liang and Xiaochen Lv
Mobile edge computing (MEC) technology with storage and computing capabilities and deployed at the edge of the network, is widely used to solve the problems of high bandwidth, low latency and high mobility for the Internet of vehicles (IoV). Edge computing servers are generally deployed on road side unit (RSU). However, since the vehicles need to share data and collaborate on computations through RSUs, RSUs may be attacked by malicious vehicles which take up RSU resources or gain control of RSU. Therefore, a trust management system needs to be designed to build a secure and trustworthy MEC data-sharing environment in IoV. Most of the previous studies have centralized authentication of vehicle identity through certificate authority (CA), which has the risk of privacy leakage. In addition, in the previously proposed blockchain-based distributed trust management schemes, the consensus mechanism consumes huge resources. Therefore, this paper proposes an autonomous and controllable distributed authentication scheme based on decentralized identifier (DID) to ensure the credibility of the vehicle’s identity, and a novel proof-of-reputation consensus mechanism based on blockchain to enhance trust management for RSU. And this paper considers the capability and reputation value of RSU and uses the deep reinforcement learning algorithm to adjust the assignment of verification nodes, block size and block interval in order to maximize the transaction throughput and improve system scalability and efficiency. The experiment shows that our scheme has good results for building a trusted data sharing system for vehicular networks.
Keywords: Blockchain, reputation management, authentication, PBFT, Markov decision process, internet of vehicles
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DOI: 10.32908/ahswn.v53.8647