Laia, Fauduziduhu, and Erwin Panggabean. “Implementation Gifford Method For Digital Image Security”. Journal of Computer Networks, Architecture and High Performance Computing 2, no. 2 (June 1, 2020): 237–244. Accessed November 8, 2026. https://www.jurnal.itscience.org/index.php/CNAPC/article/view/418.