The Bdual-Tree: indexing moving objects by space filling curves in the dual space
The VLDB Journal — The International Journal on Very Large Data Bases
Privacy in Location-Based Services: State-of-the-Art and Research Directions
MDM '07 Proceedings of the 2007 International Conference on Mobile Data Management
An Obfuscation-Based Approach for Protecting Location Privacy
IEEE Transactions on Dependable and Secure Computing
Bob-tree: an efficient B+-tree based index structure for geographic-aware obfuscation
ACIIDS'11 Proceedings of the Third international conference on Intelligent information and database systems - Volume Part I
A formal model of obfuscation and negotiation for location privacy
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
A Hilbert-based framework for preserving privacy in location-based services
International Journal of Intelligent Information and Database Systems
Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication
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The problem of preserving user's privacy in Location Based Services (LBS) has been researched increasingly. One of the techniques is obfuscation which preserves location privacy by degrading the quality of user's location information. But the less exact information, the more secure and the less effective services and most of the techniques are separated from database level. In this paper, we introduce a new approach to protect location privacy at database level, called Semantic Bob-tree, an index structure contains semantic aware information in its nodes. It can achieve high level of privacy and keep up the quality of services.