author =       {Peter F. Klemperer and Yuan Liang and Michelle L. Mazurek and Manya Sleeper and Blase Ur and Lujo Bauer and Lorrie Faith Cranor and Nitin Gupta and Michael K. Reiter},
  title =        {Tag, you can see it! {U}sing tags for access control in photo sharing},
  booktitle =    {CHI 2012: Conference on Human Factors in Computing Systems},
  year =         {2012},
  month =        may,
  url =          {http://www.ece.cmu.edu/~lbauer/papers/2012/chi2012-tags.pdf},
  doi =          {10.1145/2207676.2207728},
  pages =        {377--386},
  copyright =    {ACM},
  publisher =    {ACM},