摘要： 在车载Ad Hoc网络中，对地理位置路由的研究往往忽略安全和隐私保护问题，造成用户隐私受侵害，路由安全受威胁。该文通过笔名机制隐藏节点真实身份，保护节点位置隐私，采用群签名对消息进行认证，防止恶意节点破坏路由。分析表明，该方案在保护节点位置隐私的同时能有效抵御篡改、伪造和重放等多种攻击。

关键词: 隐私保护, 位置路由, 群签名, 笔名机制

Abstract: In Vehicular Ad Hoc Networks(VANET), position-based routing is more efficient. But most researches focus on the algorithm performance while the privacy and security issues are neglected. This paper proposes a scheme to protect the privacy and security. In the proposed scheme, position privacy is protected by using pseudonym and routing messages, which are authenticated with group signature algorithm. Security analysis shows that the scheme can effectively defeat the modification, forge and replay attacks while protecting the position privacy of nodes.

Key words: privacy protection, geographic routing, group signature, pseudonym mechanism

中图分类号: 

• TP393.08