@conference {zheleva:umtr08, title = {To Join or not to Join: The Illusion of Privacy in Social Networks with Mixed Public and Private User Profiles}, booktitle = {The Web Conference (WWW)}, number = {CS-TR-4926}, year = {2009}, note = {An earlier version appears as CS-TR-4922, July 2008}, publisher = {University of Maryland}, organization = {University of Maryland}, address = {College Park}, keywords = {anonymity online, groups, privacy, sensitive attribute inference, social networks}, author = {Zheleva, Elena and Lise Getoor} }