Sitompul, Noferianto, and Maranata Pasaribu. “Semi-Public Watermarking Digital Implementation in the Concealment of Text Messages”. Jurnal Info Sains : Informatika dan Sains 11, no. 1 (March 1, 2021): 5–10. Accessed June 23, 2026. https://ejournal.seaninstitute.or.id/index.php/InfoSains/article/view/36.