User authentication through typing biometrics features

Authors:
L.C.F. Araujo;L.H.R. Sucupira, Jr.;M.G. Lizarraga;L.L. Ling;J.B.T. Yabu-Uti
Affiliations:
Sch. of Electr. & Comput. Eng., State Univ. of Campinas, Brazil;-;-;-;-
Venue:
IEEE Transactions on Signal Processing
Year:
2005

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Abstract

This paper uses a static keystroke dynamics in user authentication. The inputs are the key down and up times and the key ASCII codes captured while the user is typing a string. Four features (key code, two keystroke latencies, and key duration) were analyzed and seven experiments were performed combining these features. The results of the experiments were evaluated with three types of user: the legitimate, the impostor and the observer impostor users. The best results were achieved utilizing all features, obtaining a false rejection rate of 1.45% and a false acceptance rate of 1.89%. This approach can be used to improve the usual login-password authentication when the password is no more a secret. This paper innovates using four features to authenticate users.