Riadi, Imam, Herman Herman, and Aulyah Zakilah Ifani. “Optimization of System Authentication Services Using Blockchain Technology”. Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control 6, no. 4 (November 30, 2021). Accessed May 20, 2022. https://kinetik.umm.ac.id/index.php/kinetik/article/view/1325.