Mahesh Kumar Reddy, P, B Kavya, and P S. G. Aruna Sri. “Internal Scrambled Virtual Keyboard for Password Protection”. International Journal of Engineering and Technology 7, no. 2.7 (March 18, 2018): 1037–1039. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/12223.