基于无证书聚合签名的导航信息更新方案  

Navigation Information Updating Scheme Based on Certificateless Aggregate Signature in Vehicle Networking

作　　者：丁晓晖 曹素珍 窦凤鸽 马佳佳 王彩芬 DING Xiao-hui;CAO Su-zhen;DOU Feng-ge;MA Jia-jia;WANG Cai-fen(School of Computer Science and Engineering,Northwest Normal University,Lanzhou 730070,China;School of Big Data and Internet,Shenzhen Technology University,Shenzhen 518118,China)

机构地区：[1]西北师范大学计算机科学与工程学院,甘肃兰州730070 [2]深圳技术大学大数据与互联网学院,广东深圳518118

出　　处：《计算机技术与发展》2022年第6期112-119,共8页Computer Technology and Development

基　　金：国家自然科学基金资助项目(61662069,61662071)。

摘　　要：车联网中实时的路况导航信息更新在安全驾驶、缓解交通拥堵等方面有着极其重要的作用,但如何保护用户隐私不被泄露是实时路况导航信息更新时所面临的一大挑战。为有效地解决该问题,提出了一种适用于车联网的具有实时导航信息更新功能的无证书聚合签名方案。方案中当导航公司需要访问数据时,雾节点将车辆广播的签名消息聚合后上传给可信中心,经可信中心批量验证后再将其反馈给导航公司。可信中心为车辆用户生成临时假名,实现用户身份的匿名性,满足了条件隐私保护的要求。利用聚合签名技术,降低了计算与通信开销。引入审查机制,进一步保证签名的安全性与可靠性。最后,基于椭圆曲线中的离散对数困难问题,证明了方案在适应性选择消息攻击下,满足存在性不可伪造。数值分析结果表明方案在计算开销方面具有一定的优越性。Real-time road navigation information update in vehicle networking plays an extremely important role in safe driving and alleviating traffic congestion.However,how to protect users’privacy from disclosure is a major challenge in real-time road navigation information update.In order to solve this problem effectively,a certificateless aggregate signature scheme with real-time navigation information update function is proposed,which is suitable for vehicle networking.In the scheme,when the navigation company needs to access the data,the fog node aggregates the signature message of the vehicle broadcast and uploads it to the trusted center,and then feeds it back to the navigation company after batch verification by the trusted center.The trusted center generates temporary pseudonyms for vehicle users,realizes the anonymity of user identity,and meets the requirements of conditional privacy protection.The aggregate signature technology is used to reduce the computing and communication overhead.A review mechanism is introduced to further ensure the security and reliability of the signature.Finally,based on the discrete logarithm difficulty problem in the elliptic curve,it is proved that the scheme satisfies the existence and cannot be forged under the adaptive selection message attack.The results of numerical analysis show that the scheme has some advantages in terms of computational cost.

关 键 词：导航信息更新 无证书密码体制 聚合签名 无双线性对 审查机制 条件隐私保护 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]