一种后向撤销隐私安全的车载自组织网络快速匿名消息认证协议

摘要

该文提出适用于车载自组织网络的快速匿名消息认证协议。通过使用基于身份的签密技术，车辆行驶至某区域后，与该区域中心相互认证，获取其所维护的周期性群签名系统密钥材料。之后，该车辆能够使用获取的密钥材料对向网络中广播的携带有群签名的消息，实现消息的匿名认证。网络中的车辆收到其它车辆广播消息之后，仅需验证群签名的合法性，避免验证消息的签发者是否是撤销用户。此外，所采用的群签名算法支持批验证运算，能够快速处理短期内收到的多个消息。除了避免撤销验证特性之外，与已有的文献相比，文中的方案能够完善地保护撤销用户的后向隐私安全性。%This paper presents an efficient anonymous message authentication scheme for vehicular ad hoc networks. By using identity-based sign-encryption technique, a vehicular user can first authenticate with a region center to obtain a group signature key material, where the group is managed by the region center. Then, the user can employ the key material to sign a message and broadcast it into the network. Other vehicular users can directly check the signature without revocation verification. In addition, the used group signature supports batch verification, which significantly reduces the verification overhead. Compared with the existing schemes, the proposed scheme can achieve backward secure revocation.