@inproceedings{khamis2017mum,
 author = {Mohamed Khamis and Linda Bandelow and Stina Schick and Dario Casadevall and Andreas Bulling and Florian Alt},
 title = {They are all after you: Investigating the Viability of a Threat Model that involves Multiple Shoulder Surfers},
 booktitle = {Proceedings of the 16th International Conference on Mobile and Ubiquitous Multimedia},
 series = {MUM '17},
 year = {2017},
 location = {Stuttgart, Germany},
 url = {http://dx.doi.org/10.1145/3152832.3152851}, 
 doi = {10.1145/3152832.3152851}, 
 publisher = {ACM},
 address = {New York, NY, USA}
}