Irmayani, Irmayani, A. Ika Putrian, Aprizal Resky, and Budyanita Asrun. “DOUBLE PENGAMANAN DATA DENGAN PLAYFAIR CHIPER DAN HILL CHIPER”. Edutech: Jurnal Pendidikan dan Teknologi 1, no. 2 (October 25, 2023). Accessed October 10, 2026. https://pustaka.my.id/journals/edutech/article/view/149.