@inproceedings{CP13, author = {X. Chen and J. Pang}, title = {Exploring dependency for query privacy protection in location-based services}, booktitle = {Proc.\ 3rd ACM Conference on Data and Application Security and Privacy (CODASPY'13)}, publisher = {ACM}, year = {2013}, pages = {37-47}, url = {http://satoss.uni.lu/jun/papers/CODASPY13.pdf} }