Pseudonym Changing at Social Spots: An Effective Strategy for Location Privacy in VANETs
Pseudonym Changing at Social Spots: An Effective Strategy for Location Privacy in VANETs
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DOI：
10.1109/tvt.2011.2162864
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发表时间：
2012-01-01
影响因子：
6.8
通讯作者：
Shen, Xuemin (Sherman)
中科院分区：
文献类型：
--
作者：
Lu, Rongxing;Lin, Xiaodong;Shen, Xuemin (Sherman)
位置隐私是车载自组织网络隐私质量的主要目标，是车载自组织网络得以充分发展的必要条件。虽然频繁的假名改变为VANESTO中的位置隐私提供了有希望的解决方案，但是如果假名在不适当的时间或位置被改变，则这样的解决方案可能变得无效。为了解决这个问题，本文提出了一种有效的假名在社交点（PCS）策略，以实现可证明的位置隐私。特别是，我们首先介绍了社会点，几辆车可能聚集，e。例如，在一个实施例中，交通灯变红时的十字路口或购物中心附近的免费停车场。以匿名集大小作为位置隐私度量，建立了两个匿名集分析模型，定量研究PCS策略所实现的位置隐私。此外，我们使用博弈论的技术来证明PCS策略在实践中的可行性。进行了广泛的性能评估，以证明更好的位置隐私，可以实现当车辆改变它的昵称在一些高度社会化的景点，建议的PCS策略可以帮助车辆智能地改变他们的昵称在正确的时间和地点。
As a prime target of the quality of privacy in vehicular ad hoc networks (VANETs), location privacy is imperative for VANETs to fully flourish. Although frequent pseudonym changing provides a promising solution for location privacy in VANETs, if the pseudonyms are changed in an improper time or location, such a solution may become invalid. To cope with the issue, in this paper, we present an effective pseudonym changing at social spots (PCS) strategy to achieve the provable location privacy. In particular, we first introduce the social spots where several vehicles may gather, e. g., a road intersection when the traffic light turns red or a free parking lot near a shopping mall. By taking the anonymity set size as the location privacy metric, we then develop two anonymity set analytic models to quantitatively investigate the location privacy that is achieved by the PCS strategy. In addition, we use game-theoretic techniques to prove the feasibility of the PCS strategy in practice. Extensive performance evaluations are conducted to demonstrate that better location privacy can be achieved when a vehicle changes its pseudonyms at some highly social spots and that the proposed PCS strategy can assist vehicles to intelligently change their pseudonyms at the right moment and place.