Permana, I., Hardjianto, M. and Ahmad Baihaqi, K. 2020. Securing the Website Login System with the SHA256 Generating Method and Time-based One-time Password (TOTP). SYSTEMATICS. 2, 2 (Aug. 2020), 65–71. DOI:https://doi.org/10.35706/sys.v2i2.3756.