Hariati, S., Pardede, A.M.H. and Sihombing, M. 2024. Application of the DCT Algorithm to Protect Image Files with Key Symbols. Journal of Artificial Intelligence and Engineering Applications (JAIEA). 3, 3 (Jun. 2024), 618–623. DOI:https://doi.org/10.59934/jaiea.v3i3.456.