Certificateless Aggregate Signature Scheme for Privacy Protection in VANET
摘要
In Vehicular Ad-hoc Network(VANET),problems such as vulnerable communication data and low computational efficiency are ubiquitous.This paper proposes a certificateless aggregation signature scheme based on certificateless public key cryptosystem and aggregation signature.The proposed scheme can resist two different types of adversary attacks under the random oracle model.Besides,it can further prove the unforgeability of communication messages under the adaptive chosen message attack.Moreover,the vehicle nodes can communicate through pseudo-identities generated by trusted authorities,thus achieving the traceability and anonymity of user communication.On the basis of bilinear pairing operations,the proposed scheme can support aggregation verification of multiple messages by aggregation signature.Simulation results show that compared with other certificateless aggregation signature schemes,the proposed scheme has higher communication efficiency in the large traffic flow section,and it can effectively achieve the privacy protection of vehicle users during VANET communication on urban roads.