Blanco Gonzalo, RamónLunerti, ChiaraSanchez-Reillo, RaulGuest, Richard Michael2021-12-142021-12-142018-03-22Blanco-Gonzalo, R., Lunerti, C., Sanchez-Reillo, R. & Guest, R. M. (2018). Biometrics: Accessibility challenge or opportunity? PLOS ONE, 13(3), e0194111.1932-6203https://hdl.handle.net/10016/33762Biometric recognition is currently implemented in several authentication contexts, most recently in mobile devices where it is expected to complement or even replace traditional authentication modalities such as PIN (Personal Identification Number) or passwords. The assumed convenience characteristics of biometrics are transparency, reliability and ease-of-use, however, the question of whether biometric recognition is as intuitive and straightforward to use is open to debate. Can biometric systems make some tasks easier for people with accessibility concerns? To investigate this question, an accessibility evaluation of a mobile app was conducted where test subjects withdraw money from a fictitious ATM (Automated Teller Machine) scenario. The biometric authentication mechanisms used include face, voice, and fingerprint. Furthermore, we employed traditional modalities of PIN and pattern in order to check if biometric recognition is indeed a real improvement. The trial test subjects within this work were people with real-life accessibility concerns. A group of people without accessibility concerns also participated, providing a baseline performance. Experimental results are presented concerning performance, HCI (Human-Computer Interaction) and accessibility, grouped according to category of accessibility concern. Our results reveal links between individual modalities and user category establishing guidelines for future accessible biometric products.20eng© 2018 Blanco-Gonzalo et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Atribución 3.0 Españaresearch articleElectrónicaTelecomunicacioneshttps://doi.org/10.1371/journal.pone.0194111open accesse01941113PLoS One13AR/0000021401