plz can anybody provide code and documentaton for the project
"A Flexible Privacy-Enhanced Location-Based Services System Framework and Practice - 2009"

plz it is very needed for me

A Flexible Privacy-Enhanced Location-Based Services System Framework and Practice

Abstract:
Location based services(LBS) are becoming increasingly important to the success and attractiveness of next generation wireless systems. However there is a natural conflict between need for user privacy and the flexible use of location information. a framework to support privacy enhanced location based services is proposed in this paper. the services are classified according to several basic criteria and a hierarchical key distribution method to support these services is proposed. The key idea behind the system is to hierarchically encrypt location information under different keys, and distribute the appropriate keys only to group members with the necessary permission.to deliver hierarchical location information while maintaining privacy, four methods are proposed. a key tree re-balancing algorithm is recommended to maintain the re-keying performance of the group key management. a practical LBS system implementation is also presented in this paper. Hierarchical location information coding offers flexible location information access which enables a rich set of location based services.

The full paper of this topic is available in this link:
cs.uml.edu/~glchen/cs650/tmc_privacy.pdf