A New Proposal for Person Identification Based on the Dynamics of Typing: Preliminary Results
Krisztián Búza, Dóra Neubrandt · Theoretical and Applied Informatics · 2017
The availability of cheap and widely applicable person identification techniques is essential due to wide-spread usage of online services. The dynamics of typing is characteristic to particular users, and users are hardly able to mimic the dynamics of typing of others. State-of-the-art solutions for person identification from the dynamics of typing are based on machine learning. The presence of hubs, i.e., few instances that appear as nearest neighbors of surprisingly many other instances, have been observed in various domains recently and hubness-aware machine learning approaches have been shown to work well in those domains. However, hubness has not been studied in context of person identification yet, and hubness-aware techniques have not been applied for this task. In this paper, we examine hubness in typing data and propose to use EC$k$NN, a recent hubness-aware regression techniques together with dynamic time warping for person identification. We collected time-series data describing the dynamics of typing and used it to evaluate our approach. Experimental results show that hubness-aware techniques outperform state-of-the-art time-series classifiers.