Reyes, Ariel Roy L, Enrique D Festijo, and Ruji P Medina. 2018. “Securing One Time Password (OTP) for Multi-Factor Out-of-Band Authentication through a 128-Bit Blowfish Algorithm”. International Journal of Communication Networks and Information Security (IJCNIS) 10 (1). https://doi.org/10.17762/ijcnis.v10i1.3188.