ALHARBI, Eman; ALGHAZZAWI, Daniyal. Two Factor Authentication Framework Using OTP-SMS Based on Blockchain. Transactions on Engineering and Computing Sciences, [S. l.], v. 7, n. 3, p. 17–27, 2019. DOI: 10.14738/tmlai.73.6524. Disponível em: https://scholarpublishing.org/journals/index.php/TECS/article/view/2133. Acesso em: 6 may. 2026.