Lubis, Muhammad Luthfi Moratuah, and Iwan Fitrianto Rahmad. “Developing Digital Examination System Security through the Implementation of the RC4 Algorithm”. Jurnal ICT : Information and Communication Technologies 16, no. 2 (October 31, 2025): 272–284. Accessed July 2, 2026. https://ejournal.marqchainstitute.or.id/index.php/JICT/article/view/274.