Efficient and multi-level privacy-preserving communication protocol for VANET

摘要: In this paper, we introduce an efficient and multi-level conditional privacy preservation authentication protocol in vehicular ad hoc networks (VANETs) based on ring signature. The proposed has three appealing characteristics: First, it offers authentication: while every receiver can verify that a message issuer is authorized participant the system only trusted authority reveal true identity of sender. Second, equipped with countermeasure: each vehicle select degree according to its own requirements. Third, efficient: our outperforms previous proposals verification, cost-effective tracking case dispute, low storage We demonstrate merits gained by through extensive analysis.