GOEL, Neha; GUPTA, Indivar; DASS, B. K. ZERO KNOWLEDGE UNDENIABLE SIGNATURE SCHEME OVER SEMIGROUP ACTION PROBLEM. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 37, p. 45–53, 2017. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6832. Acesso em: 26 sep. 2026.