Secure and Efficient Personalized Multi-Receiver Data Sharing With Cross-Domain Authentication for Internet of Vehicles

The Internet of Vehicles (IoV) has the potential to greatly improve traffic efficiency and road safety through the real-time exchange of data between vehicles and transport infrastructures. While many schemes employ Certificateless Signcryption (CLSC) to ensure data confidentiality and provide authentication in IoV, existing methods are predominantly designed for single-sender/single-receiver or multi-sender/single-receiver configurations. There is a notable gap in the research addressing the personalized sharing of data with multiple specific users. This paper addresses the practical and challenging problem of personalized multi-receiver data sharing, where customized data is sent to each recipient while remaining confidential from others. Furthermore, the dynamic and heterogeneous nature of vehicles introduces significant challenges for authentication across diverse geographic domains. To address these issues, we propose a novel, lightweight personalized multi-receiver CLSC algorithm featuring cross-domain authentication, thereby enhancing its applicability across various IoV scenarios. Our scheme also reduces computational complexity by enabling aggregated unsigncryption. Additionally, we introduce a pseudonym generation mechanism to ensure the anonymity of participants' identities while maintaining traceability. Rigorous formal security analyses demonstrate that our scheme satisfies all specified security requirements. Furthermore, the experimental evaluations confirm the efficiency and practicality of our scheme.