Application Research Of Location Privacy Protection In LBSNS

In recent years, continuous development in mobile networks and positioning technologies has created a new form of social networking services, the location-based social networking service(LBSNS) has made a heavy impact on people all over the world. The rapid development of positioning technology under the mobile environment has highlighted the new value of social network development. An important challenge in LBSNS is the privacy-aware management of location information, as well as researches on applications of protected locations to various fields of LBSNS.In this paper, we mainly focus on the location privacy in LBSNS. The goal is not only to protect user’s sensitive location information, but also can guarantee the point of interest(POI) search with high quality. We proposed some location privacy methods first in this paper. One is delivering the point of interest with location to centralized cloaking server. It could blur the location of query user. With blur location information, the LBS query could be safe. The other is finding a neighbor query user to deliver query, so the attacker could’t figure out query user. While someone proposed a hybrid cloaking system---HiSC, But HiSC has less using balance on Centralized and P2 P part, and fast user moving speed would cause low answer quality.Through the analysis of the existing location privacy protect system, we proposed a New Hybrid Privacy Protect System called NHPPS. This system combined the Centralized cloaking and P2 P cloaking. It can provide more smaller cloaking area, and less charge of the Centralized cloaking servers. Finally, Through building platform with NHPPS, we completely build LBS server and centralized cloaking server. We also developed Android client. So we can connect each client and server with network. Through this APP, users can search POI with NHPPS. Its function of this platform verified the validity and feasibility of NHPPS.