Keystroke Dynamics for User Identification
This work addresses user identification for security applications, but it is incremental as it applies existing methods to a new problem with minor modifications.
The paper tackled the multiclass user identification problem using keystroke dynamics from free-text data, achieving a classification accuracy of 0.93 with a Random Forest classifier on a modified feature, compared to 0.78 with a CNN.
In previous research, keystroke dynamics has shown promise for user authentication, based on both fixed-text and free-text data. In this research, we consider the more challenging multiclass user identification problem, based on free-text data. We experiment with a complex image-like feature that has previously been used to achieve state-of-the-art authentication results over free-text data. Using this image-like feature and multiclass Convolutional Neural Networks, we are able to obtain a classification (i.e., identification) accuracy of 0.78 over a set of 148 users. However, we find that a Random Forest classifier trained on a slightly modified version of this same feature yields an accuracy of 0.93.