Chun-I Fan, Chien-Nan Wu, Chi-Yao Weng, Chung-Yu Lin. Active One-Time Password Mechanism for User Authentication. In James J. Park, Hamid R. Arabnia, Cheonshik Kim, Weisong Shi, Joon-Min Gil, editors, Grid and Pervasive Computing - 8th International Conference, GPC 2013 and Colocated Workshops, Seoul, Korea, May 9-11, 2013. Proceedings. Volume 7861 of Lecture Notes in Computer Science, pages 464-471, Springer, 2013. [doi]