Constructing a Digital Certificate Authentication System for Classified Documents. Iraqi Journal of Science, [S. l.], v. 64, n. 3, p. 1391–1400, 2023. DOI: 10.24996/ijs.2023.64.3.31. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7715.. Acesso em: 22 jul. 2024.