Fadlil, A., 		Riadi, I., & 		Nugrahantoro, A.
(2020).
 Data Security for School Service Top-Up Transactions Based on AES Combination Blockchain Technology.
<em>Lontar Komputer : Jurnal Ilmiah Teknologi Informasi, 11</em>(3), 155-166.
doi:10.24843/LKJITI.2020.v11.i03.p04