S.SAMBASIVAM; M. PONNI. Securing Digital Documents using X.509 Certificates on Cloud Infrastructure . International journal of intellectual advancements and research in engineering computations, [S. l.], v. 6, n. 2, p. 1602–1607, 2018. Disponível em: https://ijiarec.com/ijiarec/article/view/703. Acesso em: 3 may. 2024.