一种面向连续查询的虚拟轨迹隐私保护方法

A Virtual Trajectory Privacy Protection Method for Continuous Queries

随着全球移动定位设备的普及和网络通信技术的发展,催生出基于位置服务的应用(LBS)。享受LBS带来的便利服务的同时,用户的位置轨迹隐私保护受到严峻考验。现有的位置隐私保护方法大多针对用户单次查询设计,不能适用于连续查询;且匿名效果不佳。提出了一种采用中心服务器结构的假轨迹匿名方案,通过持续选择匿名区域内长时间所在的移动用户生成假位置点,构成虚拟轨迹的方式来混淆攻击者的判断,从而达到保护用户轨迹隐私的目的。仿真实验结果表明方法有效可行。

Recently,with the spread of the global mobile positioning device and the continuous development of network communication technology,numerous applications of location based service（ LBS） were spawned. All enjoy the convenience brought by the LBS service,but at the same time the user＇s location privacy protection is a very stern test. Most existing methods of location privacy protection for users to a single query design,can not apply continuous queries,and largely anonymous the effect not beautiful. To solve above problems,a false position anonymous scheme with a central server structure is proposed through choosing mobile object which stays for a long time in the anonymous area as the target,to generate the dummy points,constitute the dummy path to confuse the attacker＇s judgment,so as to achieve purpose to protect the privacy of users track. The simulation results show that the scheme is effective and feasible.