NIU, Geng. A Blockchain-based Secure and Privacy-Preserving Healthcare Data Management Framework with SHA-256 and PoW Consensus. Informatica, [S. l.], v. 49, n. 20, 2025. DOI: 10.31449/inf.v49i20.8392. Disponível em: https://www.informatica.si/index.php/informatica/article/view/8392. Acesso em: 15 jan. 2026.