In this paper, we introduce an efficient and trustworthy conditionalprivacy-preserving communication protocol for VANETs based on proxyre-signature. The proposed protocol is characterized by the Trusted Authority(TA) designating the Roadside Units (RSUs) to translate signatures computed bythe On-Board Units (OBUs) into one that are valid with respect to TA's publickey. In addition, the proposed protocol offers both a priori and a posterioricountermeasures: it can not only provide fast anonymous authentication andprivacy tracking, but guarantees message trustworthiness for vehicle-to-vehicle(V2V) communications. Furthermore, it reduces the communication overhead andoffers fast message authentication and, low storage requirements. We useextensive analysis to demonstrate the merits of the proposed protocol and tocontrast it with previously proposed solutions.
展开▼
