An Internet of Vehicles road traffic data sharing scheme based on signcryption and editable blockchain

Aiming at the problems of low real-time update efficiency of traffic data and privacy leakage of vehicle users in the Internet of Vehicles (IoV) data sharing, an IoV road traffic data sharing scheme based on signcryption and editable blockchain is proposed. Road-Side Unit (RSU) implements proxy signcryption for sharing data based on the authorization of the vehicle, ensuring the reliability of data and reducing the frequent interaction between vehicles and authorized map companies when sharing data. The editable blockchain is implemented by the chameleon hash function, and no new blocks need to be generated when updating data, thereby reducing the storage overhead caused by updating data. Combined with editable blockchain and fog computing server, the storage, sharing and update of traffic data are better realized. Security analysis shows that the proposed scheme satisfies the confidentiality, integrity, verifiability and unforgeability. Simulation results show that the proposed scheme has less communication overhead and computing overhead.