In recent years, wearable interfaces have gained significant research attention. Additionally, since wearing masks have become a common practice due to the spread of the new coronavirus, our focus was on a mask-type interface. In a previous study, we successfully developed a facial expression recognition system using the expansion and contraction of the face mask, along with conductive threads. In this study, our objective was to verify the feasibility of the developed facial expression recognition system for personal authentication. The experiment results provided strong evidence that personal identification is possible by utilizing specific facial expressions characteristic of each user.
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