The location privacy protection research in location-based service

The rapid development of wireless communications and mobile database technology promote the extensive application of Location Based Services (LBSs), and provide a greatly convenience for people's lives. In recent years, Location Based Services has played an important role in deal with public emergencies. It is possible to access mobile users' location information anytime and anywhere. But in the meantime, user location privacy security poses a potentially grave new threat, and may suffer from some invade which could not presuppose. Location privacy issues raised by such applications have attracted more and more attention. It has become the research focus to find a balance point between the location-based highly sufficient services and users' location privacy protection. Comprehensive and efficient services are accessed under the premise of less exposed locations, that is to say, allowed the location of exposure in a controlled state. K-anonymity technique is widely used in data dissemination of data privacy protection technology, but the method is also somewhat flawed. This paper analyses on existing questions of location privacy protection system in Location Based Services at the present time, including K-anonymity technique, quality of service, query systems, and generalize and summarize the main research achievement of location privacy protection technology in recent years. And some solutions have been proposed to deal with location privacy problem in Location Based Services. The paper also analyzes how to provide efficient location-based services and better protection users' location privacy in handle public emergencies. In the end, some study trends of Location Based Services and location privacy protection are given.