Blockchain-Based Attendance System Using Hyperledger Fabric 2.5 And Ubuntu 24.04. Poornaprajna International Journal of Emerging Technologies (PIJET), [S. l.], v. 2, n. 1, p. 91–107, 2025. DOI: 10.64818/. Disponível em: https://www.poornaprajnapublication.com/index.php/pijet/article/view/89. Acesso em: 4 jun. 2026.