关键词: 车辆自组网，代理签名，代理签名簇，隐私保护，车辆单元，路边单元

Abstract: VANETs are one of the most important Internet of things(IoT) applications in the intelligent transportation field,and arc the academic and industry research priorities in recent years. VANEI's have attractive prospects for devc lopment, but its application is strictly constrained by security and privacy, so the research about security and privacy of VANETs is becoming a hot spot, and there has been a large number of research results. Based on proxy signature clus- ter,we proposed PS-PPF;a VANETs privacy protecting framework. The framework not only can provide good identity and location privacy protecting for the vehicles, but also can be implemented and deployed well because of its practice based design and expandability. There are 4 levels, 7 key roles, and 4 important proxy signatures in PS-PPF. We also in- troduced some extensible explanations for the framework. Our proxy-signature-based framework is the first one for the practiccoricnted VANETs privacy protecting framework.

Key words: VANETs, Proxy signature, Proxy signature cluster, Privacy protecting, OI3U, RSU