@inproceedings{Popa:2011:PAL:2046707.2046781,
	author = {Popa, Raluca Ada and Blumberg, Andrew J. and Balakrishnan, Hari and Li, Frank H.},
	title = {Privacy and accountability for location-based aggregate statistics},
	booktitle = {Proceedings of the 18th ACM conference on Computer and communications security},
    	series = {CCS '11},
     	year = {2011},
        pages = {653--666},
}