VANET中基于动态生成组的位置隐私保护方案*

针对现有的车载自组织网络(VANETs)位置隐私保护方案在假名更新时受到时间和邻居数目限制的问题,提出了一个基于邻近车辆的假名交换方案(PSNV)。在该方案中车辆在同一组内交换假名,并沿着移动路径累积所有的假名混合的机会,最大程度地提高位置隐私保护效果。此外,本文采用单向哈希链生成和更新假名,显著降低了假名管理的成本。大量的仿真和分析结果表明该方案有较好的隐私保护性能。

Location privacy protection based on dynamic groups in VANET

Due to the limitation of pseudonym update on timing and neighbor number of existing location privacy protection schemes, this paper proposed a new Pseudonym Swapping scheme based on Neighboring Vehicles (PSNV). Vehicles swapped pseudonyms in the same group and accumulated all the pseudonym mixtures through the paths, which have indeed sufficient improvement on location privacy. In addition, the paper adopted an ID-hash-chain to generate pseudonyms, which remarkably reduces the cost of pseudonyms management. Extensive simulation results and analyses demonstrate the better performance of privacy protection of the proposed scheme.