Papaioannou, Maria, Zachos, Georgios, Mantas, Georgios ORCID: https://orcid.org/0000-0002-8074-0417, Essop, Ismael ORCID: https://orcid.org/0000-0002-5583-0306, Saghezchi, Firooz and Rodriguez, Jonathan (2024) Outlier detection for risk-based user authentication on mobile devices. In: GLOBECOM 2023 - 2023 IEEE Global Communications Conference, Kuala Lumpur, Malaysia, 2023. IEEE Xplore . Institute of Electrical and Electronics Engineers (IEEE), Piscataway, New York, pp. 2778-2783. ISBN 979-8350310900; 979-8350310917 ISSN 2576-6813 (Print), 1930-529X (Online) (doi:10.1109/GLOBECOM54140.2023.10437467)