A Survey Paper on Privacy Preserving and Content Protecting Location Based Queries Using Two Phase Protocol

Location Based Service LBS is the service accessed on mobiles or devices with GPS. In order to use these services there are certain issues to the data being shared and the information of the user who is using this service may be exposed publicly, even though the user doesnot want to share his information in public domain. A lot of research has been done over this, to protect the users data to be accessed by unauthorised users and those who are not the intended users of that information. We propose a solution to one of the location-based query problems. A user wants to query a database of location data, known as Points of Interest (POIs), and does not want to reveal his/her location to the server due to privacy concerns; And the owner of the location data, that is, the location server, does not want to simply distribute its data to all users