@inproceedings{conf/pet/KohlweissFFGP07, title = {Efficient Oblivious Augmented Maps: Location-Based Services with a Payment Broker.}, author = {Markulf Kohlweiss and Sebastian Faust and Lothar Fritsch and Bartek Gedrojc and Bart Preneel}, booktitle = {Privacy Enhancing Technologies}, crossref = {conf/pet/2007}, editor = {Nikita Borisov and Philippe Golle}, pages = {77-94}, publisher = {Springer}, series = {Lecture Notes in Computer Science}, url = {http://dblp.uni-trier.de/db/conf/pet/pet2007.html#KohlweissFFGP07}, volume = {4776}, year = {2007}, biburl = {http://www.bibsonomy.org/bibtex/2f18e88f796d87d28a5fed7daf8752b05/dblp}, description = {dblp}, ee = {http://dx.doi.org/10.1007/978-3-540-75551-7_6}, isbn = {978-3-540-75550-0}, date = {2007-10-01}, keywords = {dblp } }