摘要
移动用户在连续位置服务过程中会产生大量的相关位置,攻击者可通过用户轮廓将其关联成位置轨迹。由于位置轨迹含有更多时空相关信息,使得攻击者更易获取用户个人隐私。针对这种情况,通过二分图刻画描述了轮廓和位置之间的关联关系,并基于该关联关系建立了Lθk隐私保护模型以及可抵抗轮廓关联攻击的假位置生成方法。该方法为每个服务位置生成轮廓信息相似的虚假位置,模糊了轮廓与真实位置之间的关联关系,保护了用户在导航或最近邻查询过程中的位置隐私。最后,性能分析及实验验证进一步证实,所提方法可提供较高的隐私保护级别和较好的算法执行效率。
When enjoying the continuous location-based services (LBSs), a mobile user will generate a se- ries of related locations, and the adversary can utilize user's profiles to correlate these locations and assemble them into a trajectory. As the trajectory contains much more temporal and spatial information than discrete loca- tions, which makes the adversary easy to infer user's privacy. In order to cope with the privacy leaks, a binary chart is used to depict the relationship between user's profiles and related locations. By the relationship depicted by the binary chart, an L~ privacy preservation model and an inference resistant dummy algorithm (IRDA) are proposed. The IRDA can generate several dummy locations for each service location with a similar profile, and obfuscate the relationship between the profile and real location. Therefore, it can preserve the location privacy of users in the service of navigation or nearest neighbor query, and achieve the continuous location privacy pres ervation. Finally, the property analysis and experiment results further verify that the proposed algorithm can provide a higher location privacy level and have better algorithm performance efficiency.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2016年第12期2894-2900,共7页
Systems Engineering and Electronics
基金
国家自然科学基金(61472097)
高等学校博士学科点专项科研基金(20132304110017)
黑龙江省自然科学基金(F2015022)资助课题
关键词
连续位置服务
隐私保护
用户轮廓信息
关联攻击
location based service
privacy preservation
user profiles
correlation attack
作者简介
张磊(1982-),男,讲师,博士研究生,主要研究方向为信息安全、位置隐私保护。E-mail:8213662@163.com
马春光(1974-),男,教授,博士,主要研究方向为密码学、信息安全。E-mail:machunguang@hrbeu.edu.cn
杨松涛(1974-),男,副教授,博士,主要研究方向为信息安全、隐私保护。E-mail:songtao_y@163.com
郑晓东(1981-),女,讲师,博士研究生,主要研究方向为信息安全、隐私保护。E-mail:lnxiaodong@126.com