The MOBIKEY Keystroke Dynamics Password Database: Benchmark Results

Abstract

In this paper we study keystroke dynamics as an authentication mechanism for touchscreen based devices. A data collection application was designed and implemented for Android devices in order to collect several types of password. Besides easy and strong passwords we propose a new type of password—logical strong—which is a strong password, but easy to remember due to the logic behind the password’s characters. Three main types of feature were used in the evaluation: time-based, touch-based and accelerometer-based. We propose a novel feature set—secondorder—which is independent of the length of the password. The preliminary results show that the lowest equal error rate (EER) is achieved by the logical strong password, followed by the strong password. The worst performance was achieved by the easy password; suggesting that the strong password is the best choice even in the case of keystroke dynamics based authentication systems.