Please have a look at the papers… I think it is really worthwhile.
Increasing the security of gaze-based graphical passwords [1]
Assessing the vulnerability of magnetic gestural authentication [2]
"Secure user authentication on mobile phones is crucial, as they store highly sensitive information. Common approaches to authenticate a user on a mobile phone are based either on entering a PIN, a password, or drawing a pattern. However, these authentication methods are vulnerable to the shoulder surfing attack. The risk of this attack has increased since means for recording high-resolution videos are cheaply and widely accessible. If the attacker can videotape the authentication process, PINs, passwords, and patterns do not even provide the most basic level of security. In this project, we assessed the vulnerability of a magnetic gestural authentication method to the video-based shoulder surfing attack. We chose a scenario that is favourable to the attacker. In a real world environment, we videotaped the interactions of four users performing magnetic signatures on a phone, in the presence of HD cameras from four different angles. We then recruited 22 participants and asked them to watch the videos and try to forge the signatures. The results revealed that with a certain threshold, i.e, th=1.67, none of the forging attacks was successful, whereas at this level all eligible login attempts were successfully recognized. The qualitative feedback also indicated that users found the magnetic gestural signature authentication method to be more secure than PIN-based and 2D signature methods."[2] There is also a youtube video: http://www.youtube.com/watch?v=vhwURyTp_jY
Looking glass: a field study on noticing interactivity of a shop window[3]
References
[1] Andreas Bulling, Florian Alt, and Albrecht Schmidt. 2012. Increasing the security of gaze-based cued-recall graphical passwords using saliency masks. In Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems (CHI '12). ACM, New York, NY, USA, 3011-3020. DOI=10.1145/2208636.2208712 http://doi.acm.org/10.1145/2208636.2208712
[2] Alireza Sahami Shirazi, Peyman Moghadam, Hamed Ketabdar, and Albrecht Schmidt. 2012. Assessing the vulnerability of magnetic gestural authentication to video-based shoulder surfing attacks. In Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems (CHI '12). ACM, New York, NY, USA, 2045-2048. DOI=10.1145/2208276.2208352 http://doi.acm.org/10.1145/2208276.2208352
[3] Jörg Müller, Robert Walter, Gilles Bailly, Michael Nischt, and Florian Alt. 2012. Looking glass: a field study on noticing interactivity of a shop window. In Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems (CHI '12). ACM, New York, NY, USA, 297-306. DOI=10.1145/2207676.2207718 http://doi.acm.org/10.1145/2207676.2207718
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