基于网格的位置隐私保护方法  

Location Privacy Protection Method Based on Grid

作　　者：李向东[1] 张少波[1,2] 郭敏[3] 王国军[1,4] LI Xiangdong;ZHANG Shaobo;GUO Min;WANG Guojun(School of Information Science and Engineering, Central South University, Changsha 410083, China;School of Computer Science and Engineering, Hunan University of Science and Technology, Xiangtan, Hunan411201, China;School of Software, Central South University, Changsha 410075, China;College of Computer Science and Educational Software, Guangzhou University, Guangzhou 510006, China)

机构地区：[1]中南大学信息科学与工程学院,长沙410083 [2]湖南科技大学计算机科学与工程学院,湖南湘潭411201 [3]中南大学软件学院,长沙410075 [4]广州大学计算机科学与教育软件学院,广州510006

出　　处：《计算机科学与探索》2017年第8期1258-1268,共11页Journal of Frontiers of Computer Science and Technology

基　　金：国家自然科学基金Nos.61472451;61272151;61402161;61502163~~

摘　　要：在基于位置的服务(location based service,LBS)中,可信第三方模型是当前位置隐私保护中的主要模型,该模型中匿名器知道用户的具体位置,若它被攻击者攻破,将会造成用户位置信息的泄露。为此,提出一种基于网格的位置隐私保护方法,该方法将可信第三方模型中可信的第三方(trusted third party,TTP)替换为一个半可信的第三方(semi-trusted third party,STTP)作为匹配服务器。该匹配服务器只起匹配和缓存的作用,无法获得用户具体位置,从而能够更好地保护用户的位置隐私。安全分析表明,该方法能有效保护用户的位置隐私;同时与可信第三方模型进行了对比分析,实验结果表明,其性能比可信第三方模型更好。In the location based service(LBS),trusted third party model is the main model of current location privacy protection.The anonymous server in this model knows the user??s location,if it is attacked,which will cause the leakage of the users location information.Therefore,this paper puts forward a location privacy protection method based on grid.The method replaces the trusted third party(TTP)as a semi-trusted third party(STTP),which is a matching server.The matching server only matches and caches,and cannot know the user??s location,so as to protect users location privacy better.Security analysis shows that this method can effectively protect the users location privacy.At the same time,this paper compares this method with trusted third party model.The experimental results show that the performance of this method is better than trusted third party model.

关 键 词：基于位置的服务 位置隐私保护 网格 半可信第三方 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]