IMMANIAR, D.; AZIZAH, N. .; SUPRIYANTI, D. .; SEPTIANI, N. .; HARDINI, M. . PoTS: Proof of Tunnel Signature for Certificate Based on Blockchain Technology. International Journal of Cyber ​​and IT Service Management (IJCITSM), [S. l.], v. 1, n. 1, p. 101–114, 2021. DOI: 10.34306/ijcitsm.v1i1.28. Disponível em: https://iiast.iaic-publisher.org/ijcitsm/index.php/IJCITSM/article/view/28. Acesso em: 13 oct. 2025.