Tag, you can see it! Using tags for access control in photo sharing.   [PDF, BibTeX, ]
Peter F. Klemperer, Yuan Liang, Michelle L. Mazurek, Manya Sleeper, Blase Ur, Lujo Bauer, Lorrie Faith Cranor, Nitin Gupta, and Michael K. Reiter.
In CHI 2012: Conference on Human Factors in Computing Systems, pages 377–386, May 2012. ACM. © ACM  DOI:10.1145/2207676.2207728