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Sarah Prange, Sarah Delgado Rodriguez, Timo Döding, Florian Alt
"Where did you first meet the owner?'' - Exploring Usable Authentication for Smart Home Visitors
In CHI EA '22: Extended Abstracts of the 2022 CHI Conference on Human Factors in Computing Systems. May 02, 2022. Association for Computing Machinery, New York, NY, USA. (bib)

In this paper, we investigate hygiene measures on public touchscreens. The COVID-19 pandemic created unprecedented questions for touch-based public displays regarding hygiene, risks, and general awareness. We study A) how COVID-19 has affected the perceptions of shared touchscreens and B) how touchscreens could be improved through hygiene-related functions. First, we report the results from an online survey (n = 286). Second, we present a hygiene concept for touchscreens that visualizes prior touches and provides information about the cleaning of the display and number of prior users. Third, we report the feedback for our hygiene concept from 77 participants. We find that there is demand for improved awareness of public displays' hygiene status, especially among those with stronger concerns about COVID-19. A particularly desired detail is when the display has been cleaned. For visualizing prior touches, fingerprints worked the best. We present further considerations for designing for hygiene on public displays.