Maulani, Giandari, Gunawan Gunawan, Leli Leli, Efa Ayu Nabila, and Windy Yestina Sari. “Digital Certificate Authority With Blockchain Cybersecurity in Education”. International Journal of Cyber ​​and IT Service Management (IJCITSM) 1, no. 1 (May 4, 2021): 136–150. Accessed October 13, 2025. https://iiast.iaic-publisher.org/ijcitsm/index.php/IJCITSM/article/view/40.