Blockchain-cloud-based secure data sharing scheme with privacy preservation for Internet of vehicles

Massive road environment data sharing can assist vehicle owners in planning optimal routes, thereby enhancing driving comfort and safety. However, existing vehicular network data-sharing services face privacy and security risks, such as the exposure of vehicle location information. To address these issues, this paper proposes a blockchain-cloud-based secure data sharing scheme with privacy preservation for Internet of vehicles, called BSDS. The scheme first utilizes blockchain and hybrid encryption to design a secure data storage model. The encrypted data is stored on the cloud server, while data credentials are stored on the blockchain, thus preventing malicious tampering with the data on the cloud server and ensuring the integrity of vehicular network data stored in the cloud. Furthermore, conditional privacy-preserving authentication technology is employed to ensure the integrity of vehicular network data during communication and achieve the privacy of identities. Comprehensive security proofs and analysis demonstrate that the proposed scheme meets essential security requirements, including confidentiality, data integrity, non-repudiation, conditional privacy protection. Extensive experimental results show that the scheme performs excellently in terms of computational overhead, communication overhead, network latency, and packet loss rate.