Farshad Fotouhi Li Xiong Traian Marius Truta Proceedings of the 2008 International Workshop on Privacy and Anonymity in Information Society, PAIS 2008, Nantes, France, March 29, 2008 2008 978-1-59593-965-4 PAIS ACM International Conference Proceeding Series ACM db/conf/edbt/pais2008.html