Back-of-Device Authentication on Smartphones
Author(s): Alexander De Luca, Emanuel von Zezschwitz, Ngo Dieu Huong Nguyen, Max-Emanuel Maurer, Elisa Rubegni, Marcello Paolo Scipioni

Date: April 2013
Publication: Proceedings of the 2013 SIGCHI Conference on Human Factors in Computing Systems, CHI '13
Page(s): 2389 - 2398
Publisher: ACM
Source 1: https://www.medien.ifi.lmu.de/pubdb/publications/pub/deluca2013chi2/deluca2013chi2.pdf
Source 2: http://www.researchgate.net/profile/Emanuel_Zezschwitz/publication/261799224_Back-of-device_authentication_on_smartphones/links/0deec5358b48e803df000000
Source 3: http://dx.doi.org/10.1145/2470654.2481330 - Subscription or payment required

Abstract or Summary:
This paper presents BoD Shapes, a novel authentication method for smartphones that uses the back of the device for input. We argue that this increases the resistance to shoulder surfing while remaining reasonably fast and easy-to-use. We performed a user study (n=24) comparing BoD Shapes to PIN authentication, Android grid unlock, and a front version of our system. Testing a front version allowed us to directly compare performance and security measures between front and back authentication. Our results show that BoD Shapes is significantly more secure than the three other approaches. While performance declined, our results show that BoD Shapes can be very fast (up to 1.5 seconds in the user study) and that learning effects have an influence on its performance. This indicates that speed improvements can be expected in long-term use.

PasswordResearch.com Note: Additional unlisted author: Marc Langheinrich


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