Investigating Handedness in Air Signatures for Magnetic 3D Gestural User Authentication
Abdallah El Ali, Hamed Ketabdar · 2015
Balancing usability and security in user authentication is essential to the adoption of any authentication method. Magnet-based Around Device Interaction (ADI), in allowing 3D gestural signatures around the device, has been shown to be a secure method for user authentication. In this paper, we further verify the usability and security of this method against video-based shoulder surfing attacks, and test the hypothesis that 2-handed gestural signatures could provide an additional layer of security. Our results showed that while 1-handed signatures are to an extent secure and usable, 2-handed input provides a poor tradeoff between usability and security. We discuss the role of 2-handed gestural input for user authentication on mobile devices.