车联网可验证匿名身份方案构建探索

Constructing a verifiable anonymous identities scheme in VANETs

针对车联网中存在的有条件隐私保护问题,提出了一个有效的匿名通信方案.该方案基于零知识证明协议构建.在车联网中,车辆向交通管理部门注册后,通过零知识证明协议向身份验证机构证明自己的成员身份,但不泄露任何与身份相关的信息,通过验证后,车辆即可生成用于消息认证的公私钥对,并将公钥发送给验证机构保存.该方案可使车联网中的车辆进行匿名通信,并可以验证其身份的真实性,还可在发生交通争执时根据需要通过权威机构揭示相关车辆的真实身份并撤销其权限.该方案还保证了同一用户不同消息间具有不可链接性,揭示同一用户多个秘钥中的一个不会影响其他密钥的安全性.

The conditional privacy preserving issue in vehicular ad hoc networks （VANETs） was ad- dressed. An efficient communication scheme was proposed based on a zero knowledge proof protocol; when a vehicle is registered with its traffic authority information in VANETs, its membership is certified by means of a zero-knowledge certification protocol without any identity-related information being disclosed. After passing the authentication, the vehicle can generate public and private key pairs for message authentication and send the public key to the verification authority to save. The. proposed scheme provides anonymous but verifiable identities for vehicles in VANETs and it also provides unlink- ability of messages belonging to a vehicle, i.e. allowing an authority to disclose their identity when a dispute arises, but without affecting the anonymity and unlinkability of their remaining messages.