@inproceedings{SIGIR-2011-ChenBSCG,
	author        = "Gang Chen and He Bai and Lidan Shou and Ke Chen and Yunjun Gao",
	booktitle     = "{Proceedings of the 34th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/2009916.2009999",
	isbn          = "978-1-4503-0757-4",
	pages         = "615--624",
	publisher     = "{ACM}",
	title         = "{UPS: efficient privacy protection in personalized web search}",
	year          = 2011,
}