Hong, S.-M.; Lee, S.; Park, Y.; Cho, Y.; Yoon, H. (2000-11-01). "On the construction of a powerful distributed authentication server without additional key management". Computer Communications. 23 (17): 1638–1644. doi:10.1016/S0140-3664(00)00250-4. https://linkinghub.elsevier.com/retrieve/pii/S0140366400002504