Multi factor authentication as a necessary solution in the fight with information technology security threats. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 3, p. 114–120, 2015. DOI: 10.17770/etr2015vol3.183. Disponível em: https://archive-journals.rtu.lv/etr/article/view/4033.. Acesso em: 11 mar. 2026.