arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.09495cs.CR
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利用上下文驱动的合成位置生成保护车辆位置隐私

Protecting Vehicle Location Privacy with Contextually-Driven Synthetic Location Generation

Sourabh Yadav, Chenyang Yu, Xinpeng Xie, Yan Huang, Chenxi Qiu

AI总结:

本文提出VehiTrack威胁模型揭示Geo-Ind在道路与交通上下文下的车辆位置隐私漏洞,并设计TransProtect地理混淆方法,将混淆限制于真实车辆移动模式,显著提升抗推理攻击能力。

摘要:

地理混淆是一种用于基于位置服务的位置隐私保护机制,允许用户上报混淆后的位置而非精确位置。一个正式的隐私准则——地理不可区分性(Geo-Ind)——要求真实位置难以被攻击者根据其混淆表示与附近位置区分开来。然而,Geo-Ind通常未考虑道路网络和车辆交通状况等上下文,这使其在保护车辆位置隐私方面效果较差,因为车辆的移动性受到这些因素的严重影响。在本文中,我们提出了VehiTrack,这是一种新的威胁模型,用于展示Geo-Ind在保护车辆位置隐私免受上下文感知推理攻击方面的脆弱性。我们的实验表明,VehiTrack能够从混淆数据中准确确定车辆的精确位置;与传统贝叶斯攻击相比,在使用拉普拉斯噪声时平均推理误差降低61.20%,在使用线性规划(LP)时降低47.35%。通过利用道路网络和交通流等上下文数据,VehiTrack在搜索车辆实际位置的过程中有效排除了大量看似“不可能”的位置。基于这些洞见,我们提出了TransProtect,这是一种新的地理混淆方法,将混淆限制在现实的车辆移动模式内,使攻击者更难区分混淆位置与实际位置。我们的结果表明,TransProtect使VehiTrack的推理误差在使用拉普拉斯噪声时增加57.75%,在使用LP时增加27.21%,显著增强了针对这些攻击的保护能力。

英文摘要:

Geo-obfuscation is a Location Privacy Protection Mechanism used in location-based services that allows users to report obfuscated locations instead of exact ones. A formal privacy criterion, geoindistinguishability (Geo-Ind), requires real locations to be hard to distinguish from nearby locations (by attackers) based on their obfuscated representations. However, Geo-Ind often fails to consider context, such as road networks and vehicle traffic conditions, making it less effective in protecting the location privacy of vehicles, of which the mobility are heavily influenced by these factors. In this paper, we introduce VehiTrack, a new threat model to demonstrate the vulnerability of Geo-Ind in protecting vehicle location privacy from context-aware inference attacks. Our experiments demonstrate that VehiTrack can accurately determine exact vehicle locations from obfuscated data, reducing average inference errors by 61.20% with Laplacian noise and 47.35% with linear programming (LP) compared to traditional Bayesian attacks. By using contextual data like road networks and traffic flow, VehiTrack effectively eliminates a significant number of seemingly "impossible" locations during its search for the actual location of the vehicles. Based on these insights, we propose TransProtect, a new geo-obfuscation approach that limits obfuscation to realistic vehicle movement patterns, complicating attackers' ability to differentiate obfuscated from actual locations. Our results show that TransProtect increases VehiTrack's inference error by 57.75% with Laplacian noise and 27.21% with LP, significantly enhancing protection against these attacks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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