Widiyanto, W. W., Iskandar, D., Wulandari, S., Susena, E., & Susanto, E. (2022). Implementation Security Digital Signature Using Rivest Shamir Adleman (RSA) Algorithm As A Letter Validation And Distribution Validation System. In 2022 International Interdisciplinary Humanitarian Conference for Sustainability (IIHC) (pp. 599–605).