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中文摘要：
隐私保护是部署VANET的重要需求, 事故责任判定要求隐私可揭露, 因此给出可追踪的VANET隐私保护方案。为解决已有方案中权威伪造签名和权威妥协后隐私泄露问题, 采取不经意传输为车辆颁发私钥, 基于秘密共享联合揭露身份。为确保高效的匿名通信, 采用了群签名、批验证、撤销预处理方法。安全分析表明, 方案在匿名性和健壮性方面优于已有方案; 性能分析表明, 方案通信和计算代价与已有方案相近, 可有效应用于有强隐私保护需求的VANET安全通信。
英文摘要：
Privacy protection is an important requirement in vehicle networks. Meanwhile, privacy requires to be disclosed when a traffic accident happens. So the paper presented a traceable privacy protection scheme. In existing schemes the issues about authority forgery and authority leaks remained unresolved. So using the oblivious transfer protocol, the manage authority issued private keys. Based on secret sharing scheme, tracking authorities collaboratively revealed identities. It used the methods of group signature, batch verification and preprocessing revocation efficiently in anonymous communication. Security analysis shows that the scheme is superior to the existing schemes in terms of unforgeability and robustness. Performance analysis shows that the cost of communication and computation is similar to the existing schemes. So it will have effective applications in VANET.
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