Sylviani, Sisilia, and Fahmi Candra Permana. “Circulan Matrix in Modification of The Hill Cipher Method ”. Jurnal MSA ( Matematika Dan Statistika Serta Aplikasinya), vol. 12, no. 1, June 2024, pp. 1-7, doi:10.24252/msa.v12i1.38578.