@inproceedings{Roalter:2013:VAS:2541831.2541863, author = {Roalter, Luis and Kranz, Matthias and M\"{o}ller, Andreas and Diewald, Stefan and Stockinger, Tobias and Koelle, Marion and Lindemann, Patrick}, title = {Visual Authentication: A Secure Single Step Authentication for User Authorization}, booktitle = {Proceedings of the 12th International Conference on Mobile and Ubiquitous Multimedia}, series = {MUM '13}, year = {2013}, isbn = {978-1-4503-2648-3}, location = {Lule\aa, Sweden}, pages = {30:1--30:4}, articleno = {30}, numpages = {4}, url = {http://doi.acm.org/10.1145/2541831.2541863}, doi = {10.1145/2541831.2541863}, acmid = {2541863}, publisher = {ACM}, address = {New York, NY, USA}, keywords = {authentication, authorization, intelligent environment, public displays, security, smartphones}, }