Por, L. Y., Ku, C. S., & Ang, T. F. (2019). Preventing Shoulder-Surfing Attacks using Digraph Substitution Rules and Pass-Image Output Feedback. MDPI.
Chicago Style (17th ed.) CitationPor, Lip Yee, Chin Soon Ku, and Tan Fong Ang. Preventing Shoulder-Surfing Attacks Using Digraph Substitution Rules and Pass-Image Output Feedback. MDPI, 2019.
MLA (9th ed.) CitationPor, Lip Yee, et al. Preventing Shoulder-Surfing Attacks Using Digraph Substitution Rules and Pass-Image Output Feedback. MDPI, 2019.
Warning: These citations may not always be 100% accurate.