车载网中条件隐私保护认证与组密钥协商方案  

Conditional privacy-preserving authentication and group key agreement scheme in vehicular ad hoc network

作　　者：宁娟桂 董国芳[1,2] NING Juan-gui;DONG Guo-fang(School of Electrical Information Engineering,Yunnan Minzu University,Kunming 650500,China;Yunnan Key Laboratory of Unmanned Autonomous System,Yunnan Minzu University,Kunming 650500,China)

机构地区：[1]云南民族大学电气信息工程学院,云南昆明650500 [2]云南民族大学云南省无人自主系统重点实验室,云南昆明650500

出　　处：《计算机工程与设计》2024年第12期3538-3545,共8页Computer Engineering and Design

基　　金：国家自然科学基金项目(61662089);云南民族大学研究生科研创新基金项目(2023SKY007)。

摘　　要：针对车载自组网中群组通信安全和组密钥更新的效率问题,提出一种条件隐私保护认证与组密钥协商方案。设计基于单向哈希链的组密钥生成和分发机制,实现组密钥快速更新,同时保证组密钥的前向和后向安全。为减轻可信机构的存储管理负担,车辆使用长期假名并利用随机数对长期假名进行随机化,隐藏车辆真实身份,实现不可链接性。可信机构使用系统私钥计算车辆的唯一标签,将标签与长期假名绑定,实现车辆的追溯。安全分析与实验结果表明,所提方案能够满足条件隐私保护、前向保密、后向保密等多种安全要求,与相关组密钥管理方案相比,能够有效降低计算开销和通信开销。For the security of group communication and the group key update efficiency in vehicular ad hoc network,the conditional privacy-preserving authentication and group key agreement scheme in vehicular ad hoc network was proposed.A group key generation and distribution mechanism based on one-way hash chain was designed,achieving fast update of group key and forward and backward security of group key.To reduce the storage management of trusted authority,vehicles used long term pseudonym and random numbers to randomize the long term pseudonym,hiding the true identity and achieving unlinkability.Trusted authority used system private key to calculate the unique tag for vehicle,binded the unique tag to long term pseudonym to enable vehicle traceability.The security analysis and experiment results show that the proposed scheme can satisfy the security requirements,such as conditional privacy-preserving,forward secrecy,backward secrecy,etc.,and compare with group key management scheme,it has a low overhead.

关 键 词：车载自组网 匿名性 组密钥协商 组密钥分发 密钥更新 条件隐私保护 消息认证 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]