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DEFT: A new distance-based feature set for keystroke dynamics

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Datum

2023

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Gesellschaft für Informatik e.V.

Zusammenfassung

Keystroke dynamics is a behavioural biometric utilised for user identification and authentication. We propose a new set of features based on the distance between keys on the keyboard, a concept that has not been considered before in keystroke dynamics. We combine flight times, a popular metric, with the distance between keys on the keyboard and call them as Distance Enhanced Flight Time features (DEFT). This novel approach provides comprehensive insights into a person’s typing behaviour, surpassing typing velocity alone. We build a DEFT model by combining DEFT features with other previously used keystroke dynamic features. The DEFT model is designed to be device-agnostic, allowing us to evaluate its effectiveness across three commonly used devices: desktop, mobile, and tablet. The DEFT model outperforms the existing state-of-the-art methods when we evaluate its effectiveness across two datasets. We obtain accuracy rates exceeding 99% and equal error rates below 10% on all three devices.

Beschreibung

Kaluarachchi, Nuwan; Kandanaarachchi, Sevvandi; Moore, Kristen; Arakala, Arathi (2023): DEFT: A new distance-based feature set for keystroke dynamics. BIOSIG 2023. Gesellschaft für Informatik e.V.. ISSN: 1617-5468. ISBN: 978-3-88579-733-3

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