<p>Graphical patterns are widely used for authentication in touch screen phones. When a user enters a pattern on a touch screen, epidermal oils of his skin leave oily residues on screen called smudge. Attackers can forensically retrieve this smudge which can help them to deduce the unlock pattern. In this paper we analyze some existing techniques and propose new techniques to prevent this attack. We propose Split pattern, Wheel lock, Random PIN lock and Temporal lock to reduce or prevent smudge attack. Usability and shoulder surfing resistance were also considered while designing these techniques. This paper explains how the proposed techniques are effective against smudge attacks. © Springer International Publishing Switzerland 2016.</p>
cited By 0; Conference of International Symposium on Intelligent Systems Technologies and Applications, ISTA 2015 co-located with 4th International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015 ; Conference Date: 10 August 2015 Through 13 August 2015; Conference Code:179339
M. D. Amruth and Praveen, K., “Android smudge attack prevention techniques”, Advances in Intelligent Systems and Computing, vol. 385, pp. 23-31, 2016.