Dynamic Anonymous Online-Offline Signcryption for Edge-Assisted Internet of Vehicles

The Internet of Vehicles (IoV) facilitates wireless communication between vehicles and traffic authoritiesto enhance road safety. However, ensuring authentication, integrity, and confidentiality in open networksremains challenging. Additionally, issues like message delays and congestion are affecting efficiency. To mitigate these limitations, a novel dynamic-anonymous edge-assisted certificate-based signcryption scheme has been proposed. By integrating dynamic anonymity and signcryption, the scheme eliminates multiple pseudonym storage. Besides, its certificate-based framework removes secure channel dependency and mitigates key escrow risks. A formal security proof is provided, based on the hardness of the Elliptic Curve Discrete Logarithm Problem. An informal security analysis confirms the scheme's robustness against various practical attacks. Additionally, detailed efficiency evaluation shows that the offline and online signcryption processes incur only 16.88% and 22.81% of the computational cost of the same phases of a recent design.