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- W2893630606 abstract "Behavioural biometrics in the context of security and authentication looks at the discriminative features of a user's measurable behaviour. This generally includes timing and location information related to, for example, screen touches and key presses, otherwise known as keystroke dynamics (KD). Research into KD has looked at discriminating features of behavioural patterns of expert typists, which are generally very stable, as well as patterns of novices, which are generally very unstable, if only because of rapid increases in skill level due to practice. The general population, however, at which such authentication solutions are aimed are not expert typists, and quickly move away from being novices, which we found causes significant degradation of biometric recognition performance over time. This is because the biometric data entered at a later stage will increasingly differ from data gathered during enrollment. Accounting for practice effects in KD systems is diffcult, as not much is yet known about the way behaviour develops over time in biometrics literature. However, with the advent of open science, not only can we incorporate many new insights from the psychology of (motor) learning, but also re-analyse data sets gathered in this field in a biometric context. In this paper we present initial analyses over a single data set, in which 36 (18 older, 18 young) participants were asked to complete a password-entry-like cognitive task, the Discrete Sequence Production task, a significant number of times spread over two sessions. Using out-of-the-box classiffiers, we found that biometric recognition performance takes a long time, 75 repeats, to stabilize, as well as hints towards better initial biometric recognition performance for older participants than for younger." @default.
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- W2893630606 date "2017-01-01" @default.
- W2893630606 modified "2023-09-25" @default.
- W2893630606 title "Towards understanding behavioural biometric classifier performance over time and practice" @default.
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