Research on the Design and Development of a Secure Cold Wallet Device for Blockchain. Journal of Science and Technology on Information security, [S. l.], v. 3, n. 26, p. 18–24, 2025. DOI: 10.54654/isj.v2i25.1140. Disponível em: https://isj-test.hypertek.vn/index.php/journal_STIS/article/view/1140. Acesso em: 9 sep. 2026.