Cheap and Easy PIN Entering Using Eye Gaze

PINs are one of the most popular methods to perform simple and fast user authentication. PIN stands for Personal Identi cation Number, which may have any number of digits or even letters. Nevertheless, 4-digit PIN is the most common and is used for instance in ATMs or cellular phones. The main advantage of the PIN is that it is easy to remember and fast to enter. There are, however, some drawbacks. One of them addressed in this paper is a possibility to steal PIN by a technique called shoulder sur ng. To avoid such problems a novel method of the PIN entering was proposed. Instead of using a numerical keyboard, the PIN may be entered by eye gazes, which is a hands-free, easy and robust technique.