@inproceedings{CHI-2014-LucaHZMSHS,
	author        = "Alexander De Luca and Marian Harbach and Emanuel von Zezschwitz and Max-Emanuel Maurer and Bernhard Ewald Slawik and Heinrich Hußmann and Matthew Smith",
	booktitle     = "{Proceedings of the 32nd ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/2556288.2557097",
	isbn          = "978-1-4503-2473-1",
	pages         = "2937--2946",
	publisher     = "{ACM}",
	title         = "{Now you see me, now you don’t: protecting smartphone authentication from shoulder surfers}",
	year          = 2014,
}