连续服务请求下基于假位置的用户隐私增强方法

发布时间：2018-04-02 23:28

本文选题：基于位置的服务　切入点：隐私增强　出处：《通信学报》2016年07期

【摘要】：基于假位置的隐私保护方案在为用户提供准确位置服务查询结果的同时,还无需第三方和共享密钥。然而,当用户连续请求位置服务时,由于现有保护单次查询的假位置方案未考虑相邻位置集合间的时空关系,使攻击者能推断出假位置,降低用户的位置隐私保护等级。针对上述问题,采用现有假位置方案生成候选假位置,并通过连续合理性检查和单次隐私增强对其进行筛选,提出一个适用于连续请求的假位置隐私保护增强方法。安全性分析表明,所提方法能保证连续请求中形成的移动路径在时空上不可区分,有效保护连续请求中的用户位置隐私。大量实验表明,所提方法在不增加用户计算开销的同时,与采用的候选假位置生成方案相比,还能提高用户单次查询的隐私保护等级。
[Abstract]:The pseudo-location-based privacy protection scheme not only provides users with accurate location service query results, but also does not need third party and shared keys.However, when the user requests location service continuously, because the existing false location schemes for single query do not consider the space-time relationship between adjacent location sets, the attacker can deduce the false location and reduce the privacy protection level of the user's location.In order to solve the above problems, the existing false location schemes are used to generate candidate false locations, and a method for enhancing the privacy of false locations is proposed, which is suitable for continuous request by continuous rationality check and single privacy enhancement.The security analysis shows that the proposed method can ensure that the mobile paths formed in continuous requests are indistinguishable in time and space, and effectively protect the privacy of users' location in continuous requests.A large number of experiments show that the proposed method can improve the privacy protection level of a single query compared with the candidate false location generation scheme without increasing the computational overhead of the user.
【作者单位】：西安电子科技大学网络与信息安全学院;
【基金】：国家自然科学基金资助项目(No.61372075,No.U1405255,No.61202389,No.61472310)~~
【分类号】：TP309

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