ENHANCING E-HEALTHCARE SECURITY WITH BLOCKCHAIN-BASED ACCESS CONTROL: A DECENTRALIZED APPROACH TO DATA PRIVACY AND INTEGRITY. International Journal of Engineering Research and Science & Technology, [S. l.], v. 21, n. 1, p. 98–114, 2025. DOI: 10.62643/. Disponível em: https://ijerst.org/index.php/ijerst/article/view/521. Acesso em: 24 sep. 2026.