Proposing a Secure URL Shortening Service by using Blackboard Architecture. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), [S. l.], v. 34, n. 2, p. 209–226, 2021. DOI: 10.55562/jrucs.v34i2.291. Disponível em: https://jrucs.iq/index.php/JAUCS/article/view/291. Acesso em: 12 oct. 2025.