摘要
车载自组网(VANET)在共享交通数据、提升行车效率、减少交通事故等方面具有明显优势,对智能交通系统的构建至关重要。与此同时,车与车之间、车与基础设施之间的安全通信,车辆的隐私保护(如身份隐私、位置隐私),交通消息的高效认证等问题亟待解决。为了实现安全性和效率的平衡,首先,分析并证明最近提出的方案——条件隐私保护无证书聚合签名方案(CPP-CLAS)不能抵抗公钥替换攻击;其次,在此基础上提出一种新型VANET无证书条件隐私保护认证方案,方案中的车辆在申请部分私钥时不依赖安全信道,并采用聚合认证和批量认证技术批量验证签名;最后,在随机预言机模型下证明了所提方案具有不可伪造性。性能分析表明,与同类型方案相比,所提方案在没有增加验证开销的基础上,将签名阶段的计算效率至少提升了66.76%,通信带宽需求至少降低了16.67%,验证了该方案更加适用于资源受限的VANET。
Vehicular Ad-hoc NETwork(VANET)is vital for constructiong intelligent transportation systems because of obvious advantages in sharing traffic data,improving driving efficiency and reducing traffic accidents.Meanwhile,problems such as secure communication of vehicle-to-vehicle and vehicle-to-infrastructure,privacy-preserving of vehicles(e.g.,identity privacy,location privacy),and efficient authentication of traffic messages need to be solved urgently.To achieve a trade-off between security and efficiency,firstly,the recently proposed scheme,namely Conditional Privacy-Preserving CertificateLess Aggregate Signature scheme(CPP-CLAS),was analyzed and proved to be unable to resist the public key replacement attack.Then,based on this scheme,a new certificateless conditional privacy-preserving authentication scheme for VANET was proposed,in which the secure channels were not required during partial private key generation of vehicles.In addition,aggregate verification and batch verification were employed to verify a batch of signatures in the scheme.Finally,the proposed scheme was proved to have unforgeability under random oracle model.Performance analysis show that compared with the similar schemes,the proposed scheme improves the computational efficiency of the signature phase by at least 66.76%and reduces the communication bandwidth demand by at least 16.67%without increasing the verification overhead,verifying that the proposed scheme is more suitable for resource-constrained VANET.
作者
徐贵双
殷新春
XU Guishuang;YIN Xinchun(College of Information Engineering,Yangzhou University,Yangzhou Jiangsu 225127,China;Guangdong Provincial Key Laboratory of Information Security Technology(Sun Yat-sen University),Guangzhou Guangdong 510006,China;Guangling College,Yangzhou University,Yangzhou Jiangsu 225128,China)
出处
《计算机应用》
CSCD
北大核心
2023年第11期3358-3367,共10页
journal of Computer Applications
基金
广东省信息安全技术重点实验室开放基金资助项目(2020B1212060078)。
关键词
车载自组网
消息认证
条件隐私保护
安全信道
可证明安全
Vehicular Ad-hoc NETwork(VANET)
message authentication
conditional privacy-preserving
secure channel
provable security
