A Blockchain-based Cross-domain Authentication for Conditional Privacy Preserving in Vehicular Ad-hoc Network

Vehicular Ad-Hoc Network enhances the driving safety and enables various intelligent transportation applications by adopting the revolutionary vehicular wireless communication technology, which attracts a lot of attention from academia and industry in recent years. Given the sophistication of vehicular manufacturing and the heterogeneity of intelligent transport terminals, performing vehicular authentication in the message exchange process is crucially important, while existing schemes fail to adapt to multi-domain scenario, and satisfy security, anonymity and conditional privacy protection simultaneously. To this end, we present a blockchain-based multi-domain vehicular authentication scheme, wherein a pseudonym-based authentication method is proposed to guarantee the anonymity and traceability. Specially, the pseudonym generation and distribution are supervised and executed by multiple entities, which improves the reliability and can adapt to the dynamic and unpredictable pseudonym requests. Furthermore, the security analysis and experiment results show the feasibility and low overhead of the proposed scheme.