Key result
Photoplethysmography signals decomposed into a sum-of-Gaussians representation achieved rank-1 biometric authentication accuracies of 90% and 95% with 2 and 8 seconds of test data, respectively.
Why the study?
Can photoplethysmography (PPG) signals be used for robust biometric authentication?
Can photoplethysmography (PPG) signals be used for robust biometric authentication?
Photoplethysmography (PPG) signals can be effectively used for biometric authentication, achieving high accuracy even across different emotional states.
May enable PPG biometrics in cardiac wearables; leaves open prospective validation before clinical use.
This paper considers signals from the cardiovascular system for possible use in biometric authentication. The signals of particular interest here derive from photoplethysmography (PPG), which refers to the use of illumination-based sensors that are sensitive to volumetric changes as blood travels through the body. Photoplethysmography sensors have been developed for the fingertip and the ear lobe, and they provide a convenient, noninvasive means of measuring heart rate and heart-rate variability. We demonstrate in this paper that PPG-based signals also have the potential to be used for biometric authentication, even though PPG signals appear to convey much less information than their electromagnetic counterparts, electrocardiograms (ECG). Through a novel decomposition into a sum-of-Gaussians representation, we present experimental results that indicate rank-1 accuracies of 90% and 95% with 2 seconds and 8 seconds of PPG test signal data, respectively. To our knowledge, this paper is the first to demonstrate robust PPG-based authentication for subjects with different emotional states.
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Sarkar et al. (2016) studied Biometric authentication. Photoplethysmography (PPG) signals was evaluated on Rank-1 accuracy. Photoplethysmography signals decomposed into a sum-of-Gaussians representation achieved rank-1 biometric authentication accuracies of 90% and 95% with 2 and 8 seconds of test data, respectively.
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