New Cryptosystem Using Sumudu Transform, Combination of Three Functions with Simulation and Python Code. Punjab University Journal of Mathematics, [S. l.], v. 56, n. 11, p. 770–780, 2025. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/538. Acesso em: 26 oct. 2025.