A Flexible Privacy Enhanced Location Based Services System Framework and Project

Abstract:

                  The framework we propose fits the best for this promising class of service. The traditional LBS architecture is network centric, where location information is tightly coupled to specific network operators and not open to the third-party LBS providers. We present an architecture which is end device centric and loosely coupled where the location access is through an open-service architecture based on a layer of middleware which is accessible to the third-party service providers and users. This architecture adds a GS to provide location access control. Another benefit of this architecture is that the LS can be loosely coupled with the core network. This is essential to support LBSs in heterogeneous networks. Our implementation in Section 7 includes all the system components in the architecture.

In our system, an adversary is defined as any party who is not trusted to record a user’s location at a specific granularity and time based on these trust parameters. Our scheme is resilient to this threat since the location information is encrypted and no information is leaked to eavesdroppers. Our scheme is resilient to collusion among adversaries, and is also resilient to collusion between adversaries and trusted users for instantaneous location tracking if we change the GKs frequently. However, we cannot prevent trusted users from unauthorized sharing of secret keys or location information with adversaries.