Kim, Young-Soo, and Byoung Yup Lee. “Kerberos System Based Security Model Using Two Factor Authentication for Cloud Computing”.
International Journal of Engineering and Technology 7, no. 4.39 (December 13, 2018): 677–680. Accessed May 29, 2025.
https://mail.sciencepubco.com/index.php/IJET/article/view/25578.