Simbolon, Goklas Tomu, Opim Salim Sitompul, and Erna Budhiarti Nababan. 2019. “Data Security Using Multi-Bit LSB and Modified Vernam Cipher”. Data Science: Journal of Computing and Applied Informatics 3 (2):86-94. https://doi.org/10.32734/jocai.v3.i2-1048.