A practical solution for blockchain-secured sharing of trustworthy traffic information in vehicular ad hoc networks

摘要

The extensive use of vehicles nowadays and the emergency of autonomous driving urge the improvement of traffic safety. Prevalent approaches competent at preventing road accidents are inseparable from the trustworthy data acquisition. But in vehicular ad hoc networks (VANETs), data transmission and storage are unreliable due to constrained resource and unsteady topology. Currently, distribution is widely applied into VANETs for multifold data protection and blockchain becomes preferred with its distributed consensus and ledger for data trust protection. Therefore, we propose a system in this paper, which employs blockchain technology to secure the sharing of visual traffic information. As proposed, the sequence of frames is used for their integrity consensus, the transaction capacity is adjusted according to the frame types, and transcoding frames is defined via smart contracts; thus, traffic information gains more in-depth protection. With the proposed system, vehicles can confidently use the information for safety guidance.