Is Bigger Better? Comparing User-Generated Passwords on 3x3 vs. 4x4 Grid Sizes for Android's Pattern Unlock. - Adam J. Aviv; Devon Budzitowski; Ravi Kuber (ACSAC, 2015)

Is Bigger Better When It Comes to Android Graphical Pattern Unlock? - Adam J. Aviv; Ravi Kuber; Devon Budzitowski (IEEE Internet Comput., 2017)