Adam J. Aviv, Devon Budzitowski, Ravi Kuber. Is Bigger Better? Comparing User-Generated Passwords on 3x3 vs. 4x4 Grid Sizes for Android's Pattern Unlock. In Proceedings of the 31st Annual Computer Security Applications Conference, Los Angeles, CA, USA, December 7-11, 2015. pages 301-310, ACM, 2015. [doi]
Abstract is missing.