Dynamic Framework for Protection of Location Services

Abstract

Location-based services facilitate services for mobile users by getting the current location of a user and user needs to send his location data continuously to the un trusted server to obtain this service. This causes security issue revealing user’s private data in the network. In the existing privacy-preserving technique, there are some draw backs while providing these services like it requires a fully-trusted third party, offers minimal security assurance and high range of communication overhead. We define a user-defined privacy grid system known as Dynamic grid system (DGS) which fills the gaps of existing technique for privacy-preserving snapshot and continuous LBS which fulfills below: 1) This requires a semi trusted party which performs the matching operations accurately and it doesn’t have access to user’s location or private data. 2) Secure snapshot and continuous location privacy is assured. 3) Low communication over head since it depends on POIs of users in his area but not the level of privacy. 4) Extends support to other spatial queries by not changing the algorithms but the required area needs to be sent as spatial regions. From the analysis, it is proved that the DGS is more efficient in terms of privacy preserving than the state-of-the-art technique for continuous location based services.