Faris, F. A. E. F., F. Y. Febi, I. I. Iwan, and P. Pizaini. “Combination of Vigenere Cipher Cryptographic Algorithm With Zigzag Method in Securing Text Messages”. Jurnal CoSciTech (Computer Science and Information Technology), Vol. 4, no. 1, Apr. 2023, pp. 182-9, doi:10.37859/coscitech.v4i1.4787.