Ausgewählte Publikationen

Hier finden Sie ausgewählte Publikationen aus den letzten Jahren. Eine ausführliche Liste der Publikationen finden Sie auf der Google Scholar oder DBLP Seite von Stefan Schneegaß.

Art der Publikation: Beitrag in Sammelwerk

Graphical Passwords in the Wild: Understanding How Users Choose Pictures and Passwords in Image-based Authentication Schemes

Autor(en):
Florian Alt, Stefan Schneegass, Alireza Sahami Shirazi, Mariam Hassib, and Andreas Bulling
Titel des Sammelbands:
Proceedings of the 17th International Conference on Human-Computer Interaction with Mobile Devices and Services (MobileHCI '15)
Seiten:
316-322
Verlag:
ACM
Ort(e):
New York, USA
Veröffentlichung:
2015
ISBN:
978-1-4503-3652-9
Digital Object Identifier (DOI):
doi:10.1145/2785830.2785882
Zitation:
Download RIS

Kurzfassung

Common user authentication methods on smartphones, such as lock patterns, PINs, or passwords, impose a trade-off between security and password memorability. Image-based passwords were proposed as a secure and usable alternative. As of today, however, it remains unclear how such schemes are used in the wild. We present the first study to investigate how image-based passwords are used over long periods of time in the real world. Our analyses are based on data from 2318 unique devices collected over more than one year using a custom application released in the Android Play store. We present an in-depth analysis of what kind of images users select, how they define their passwords, and how secure these passwords are. Our findings provide valuable insights into real-world use of image-based passwords and inform the design of future graphical authentication schemes.