EarCapAuth: Biometric Method for Earables Using Capacitive Sensing Eartips

• URL: http://arxiv.org/abs/2411.04657v1
• Date: Thu, 07 Nov 2024 12:35:02 GMT
• Title: EarCapAuth: Biometric Method for Earables Using Capacitive Sensing Eartips
• Authors: Richard Hanser, Tobias Röddiger, Till Riedel, Michael Beigl,
• Abstract summary: EarCapAuth is an authentication mechanism using 48 capacitive electrodes embedded into the soft silicone eartips of two earables. For identification, EarCapAuth achieves 89.95%. This outperforms some earable biometric principles from related work. In the future, EarCapAuth could be integrated into high-resolution brain sensing electrode tips.
• Score: 5.958529344837165
• License:
• Abstract: Earphones can give access to sensitive information via voice assistants which demands security methods that prevent unauthorized use. Therefore, we developed EarCapAuth, an authentication mechanism using 48 capacitive electrodes embedded into the soft silicone eartips of two earables. For evaluation, we gathered capactive ear canal measurements from 20 participants in 20 wearing sessions (12 at rest, 8 while walking). A per user classifier trained for authentication achieves an EER of 7.62% and can be tuned to a FAR (False Acceptance Rate) of 1% at FRR (False Rejection Rate) of 16.14%. For identification, EarCapAuth achieves 89.95%. This outperforms some earable biometric principles from related work. Performance under motion slightly decreased to 9.76% EER for authentication and 86.40% accuracy for identification. Enrollment can be performed rapidly with multiple short earpiece insertions and a biometric decision is made every 0.33s. In the future, EarCapAuth could be integrated into high-resolution brain sensing electrode tips.

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