publication Journal Article 2020 Published in: https://doi.org/10.1016/j.cose.2019.101635 Is image-based CAPTCHA secure against attacks based on machine learning? An experimental study Alqahtani, Fatmah H. . 2020 CAPTCHAs Deep learning Machine learning Security User authentication Volume Number 88 Magazine \ Newspaper Elsevier Computers & Security more of publication Is image-based CAPTCHA secure against attacks based on machine learning? An experimental study by Fatmah H. Alqahtani, Fawaz A. Alsulaiman 2020 Haptic Handwritten Signatures: The effect of Deconcentrated Dissimilarities on Manifold Extraction by Julio J. Valdes, Fawaz A. Alsulaiman, Abdulmataleb A. El Saddik 2015 A Synchronous Interpersonal Haptic Communication System by A. El Saddik, J.Cha, M.A. Eid, F. A. Alsulaiman, A. Alamri, L. Rahal, D.J. Martin 2012