VANETs中基于群签名的假名交换位置隐私保护方案

Privacy protection scheme of pseudonym exchange location based on group signature in VANETs

针对车载自组织网络(vehicular ad-hoc networks, VANETs)中增强道路安全的应用频繁收集车辆位置数据导致的位置隐私泄露,以及现有位置隐私保护方案假名混淆程度较低、计算开销较大等不足,采用群签名技术,通过选取与自身行驶状态最相似的车辆进行假名交换,提高车辆假名的混淆程度,降低攻击者成功链接车辆新旧假名的概率,有效阻断攻击者的跟踪,保护车辆用户的真实位置。仿真结果表明,所提方案能有效保护车辆的位置隐私,同时降低了权威机构的计算开销和攻击者的跟踪成功率。

To address the location privacy leakage caused by the frequent collection of vehicle location data by applications for enhanced road safety in VANETs, and the shortcomings of existing location privacy protection schemes such as low pseudonym obfuscation degree and high computational overhead, the group signature technology was used to improve the degree of vehicle pseudonym obfuscation by selecting the vehicle with the most similar driving status for pseudonym exchange, reduce the probability of attackers successfully linking the old and new pseudonyms of vehicles, effectively block the tracking of attackers, and protect the real location of vehicle users.Simulation results show that the proposed scheme can effectively protect the location privacy of vehicles, and reduce the computational overhead of authorities and the tracking success rate of attackers.