Iswan, M., Syaifuddin, M. and Wijaya, R.F. 2021. The Effectiveness of Smart Learning Based on Expert Systems in Cryptography Courses. JURNAL TEKNOLOGI DAN OPEN SOURCE. 4, 2 (Dec. 2021), 205 - 215. DOI:https://doi.org/10.36378/jtos.v4i2.1795.