@inproceedings{deluca2013chi2,
 author = {De Luca, Alexander and von Zezschwitz, Emanuel and Nguyen, Ngo Dieu Huong and Maurer, Max-Emanuel and Rubegni, Elisa and Scipioni, Marcello Paolo and Langheinrich, Marc},
 title = {Back-of-device authentication on smartphones},
 booktitle = {Proceedings of the SIGCHI Conference on Human Factors in Computing Systems},
 series = {CHI '13},
 year = {2013},
 isbn = {978-1-4503-1899-0},
 location = {Paris, France},
 pages = {2389--2398},
 numpages = {10},
 url = {http://doi.acm.org/10.1145/2470654.2481330},
 doi = {10.1145/2470654.2481330},
 acmid = {2481330},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {authentication, back of device interaction, security},
}