An efficient blockchain‐based batch verification scheme for vehicular ad hoc networks

As an important branch of the Internet of Things (IoT), Vehicular Ad Hoc Networks (VANETs) have attracted wide attention from industrial and academic. Due to an opening wireless channel, the security and efficiency of VANETs have also become serious. To enhance the security and efficiency, various batch verification schemes have been proposed. However, most of those schemes suffer from the complicated certificate management problem or different kinds of attacks. Also,the bilinear pairing which is intractable for lightweight devices in VANETs usually be used inthose schemes. To solve the above problems, we propose an efficient blockchain‐based batch verification scheme for VANETs using the Elliptic Curve Cryptography (ECC). We also provide security analysis to show its ability to resist current known attacks. Besides, we have implemented corresponding blockchain system and the performance analysis shows that it is suitable for VANETs.