An Efficient ElGamal Cryptosystem Based on Prime Power Moduli and Modular Key Exchange. Journal of Prime Research in Mathematics, [S. l.], v. 21, n. 2, p. 37–50, 2025. Disponível em: https://jprm.sms.edu.pk/index.php/jprm/article/view/253. Acesso em: 12 oct. 2025.