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 (Apr. 2022), 586-594. DOI:https://doi.org/10.33395/sinkron.v7i2.11391.