Geetika Kovelamudi, Jun Zheng, Srinivas Mukkamala. Scramble or not, that is the question a study of the security and usability of scramble keypad for PIN unlock on smartphones. In 2016 IEEE/CIC International Conference on Communications in China, ICCC 2016, Chengdu, China, July 27-29, 2016. pages 1-6, IEEE, 2016. [doi]
Abstract is missing.