Panggabean D, Hasibuan SA, Roza YF. Effectiveness of Text Messages Using Substitution Ciphers and Transposition Ciphers. bigint [Internet]. 2024 Jan. 31 [cited 2025 Aug. 8];2(1):1-8. Available from: https://journal.aira.or.id/index.php/bigint/article/view/578