Ritonga, A. R., Irmayani, D. . and Ritonga, A. A. . (2022) “Rivest Cipher 6 Algorithm Method to secure messages of Medical Record files at Perlayuan Health Center ”, Sinkron : jurnal dan penelitian teknik informatika, 6(2), pp. 586-594. doi: 10.33395/sinkron.v7i2.11391.