@inproceedings{vonZezschwitz:2015:SFS:2702123.2702212,
 author = {von Zezschwitz, Emanuel and De Luca, Alexander and Brunkow, Bruno and Hussmann, Heinrich},
 title = {SwiPIN: Fast and Secure PIN-Entry on Smartphones},
 booktitle = {Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems},
 series = {CHI '15},
 year = {2015},
 isbn = {978-1-4503-3145-6},
 location = {Seoul, Republic of Korea},
 pages = {1403--1406},
 numpages = {4},
 url = {http://doi.acm.org/10.1145/2702123.2702212},
 doi = {10.1145/2702123.2702212},
 acmid = {2702212},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {authentication, mobile devices, shoulder surfing},
}