Ritonga, Aldi Rapandi, Deci Irmayani, and Ali Akbar Ritonga. 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):586-94. https://doi.org/10.33395/sinkron.v7i2.11391.