Now You See Me, Now You Don't: Protecting Smartphone Authentication from Shoulder Surfers
Author(s): Alexander De Luca, Marian Harbach, Emanuel von Zezschwitz, Max-Emanuel Maurer, Bernhard Ewald Slawik, Heinrich Hussmann

Date: April 2014
Publication: Proceedings of the 2014 SIGCHI Conference on Human Factors in Computing Systems, CHI '14
Page(s): 2937 - 2946
Publisher: ACM
Source 1: http://www.researchgate.net/profile/Marian_Harbach/publication/262640739_Now_you_see_me_now_you_don%27t_protecting_smartphone_authentication_from_shoulder_surfers/file/9c96053858690e2cc4.pdf
Source 2: http://www.medien.ifi.lmu.de/pubdb/publications/pub/deluca2014chi/deluca2014chi.pdf
Source 3: http://dx.doi.org/10.1145/2556288.2557097 - Subscription or payment required

Abstract:
In this paper, we present XSide, an authentication mechanism that uses the front and the back of smartphones to enter stroke-based passwords. Users can switch sides during input to minimize the risk of shoulder surfing. We performed a user study (n = 32) to explore how switching sides during authentication affects usability and security of the system. The results indicate that switching the sides increases security while authentication speed stays relatively fast (less than 4 seconds). The paper furthermore provides insights on accuracy of eyes-free input (as used in XSide) and shows how 3D printed prototype cases can improve the back-of-device interaction experience.

PasswordResearch.com Note: Additional unlisted author is Matthew Smith


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