基于通用单向累加器的车载自组织网络隐私保护撤销机制

Privacy protection revocation mechanism based on universal one-way accumulator in VANET

针对车载自组织网络(vehicular Ad hoc network,VANET)中撤销异常行为车辆可能导致敏感信息泄露的问题,提出了一种基于通用单向累加器的隐私保护撤销机制(privacy protection revocation mechanism based on one-way accumulator,OWA-PPRM)。首先,将所有撤销信息累加到一个值并将其传播给网络中的所有实体节点;然后,车辆与没有泄露个人信息的公共道路路边系统(road-side units,RSU)进行通信来更新证书;最后,利用移动存储库从RSU下载和更新单向累加器的副本以及目击证人的必要信息。仿真结果表明,OWA-PPRM显著降低了认证管理计算复杂度,大大提高了认证效率,同时保护了用户的隐私。

To solve the problem of leaking sensitive information in VANET while the revocation misbehaving vehicles, this pa- per proposed a OWA-PPRM. Firstly, it accumulated all of the revocation informations to a single value that was transmitted to all the entities in the network. Then, the vehicles contacted RSU without leaking personal information to obtain and update the certificate. Finally, it downloaded and updated the copy of one-way accumulator and the auxiliary information necessary of the witness from RSU using mobile repository. Simulation results show that the OWA-PPRM significantly reduces the complexity of certificate management, and it achieves great efficiency and scalability while preserving the users＇ privacy.