Arif Indra Irawan, Iman Hedi Santoso, Istikmal, and Maya Rahayu. “Implementation of QR Code Attendance Security System Using RSA and Hash Algorithms ”. Jurnal Nasional Teknik Elektro dan Teknologi Informasi 13, no. 1 (February 23, 2024): 53-59. Accessed June 30, 2024. https://jurnal.ugm.ac.id/v3/JNTETI/article/view/4395.