Certificateless Aggregate Signature Scheme with Conditional Privacy Protection in Vehicle Networking

Real-time road navigation information update in vehicle networking plays an extremely important role in safe driving and alleviating traffic congestion, but how to protect user privacy from leakage is a major challenge when updating real-time navigation information. In order to solve this problem effectively, a certificateless aggregate signature scheme with real-time navigation information update function is proposed, which is suitable for vehicle networking. In the scheme, when the navigation company needs to access the data, the fog node aggregates the signature message of the vehicle broadcast and uploads it to the trusted center, and then feeds it back to the navigation company after batch verification by the trusted center. The trusted center generates temporary pseudonyms for vehicle users, realizes the anonymity of user identity, and meets the requirements of conditional privacy protection. The aggregate signature technology is used to reduce the computing and communication overhead. Finally, based on the discrete logarithm difficulty problem in the elliptic curve, it is proved that the scheme satisfies the existence and can not be forged under the adaptive selection message attack. The results of numerical analysis show that the scheme has some advantages in terms of computational cost.