HRYSHCHUK , O. FORMALIZED SCIENTIFIC PROBLEM STATEMENT FOR THE DEVELOPMENT OF A SYMMETRIC CRYPTOGRAPHIC SYSTEM FOR PROTECTING VOICE INFORMATION. . Ukrainian Scientific Journal of Information Security, [S. l.], v. 30, n. 2, p. 297–302, 2024. DOI: 10.18372/2225-5036.30.19242. Disponível em: http://jrnl.kai.edu.ua/index.php/Infosecurity/article/view/19242. Acesso em: 14 jun. 2026.