Yang-Wai Chow, Willy Susilo. Enhanced STE3D-CAP: A Novel 3D CAPTCHA Family. In Mark Dermot Ryan, Ben Smyth, Guilin Wang, editors, Information Security Practice and Experience - 8th International Conference, ISPEC 2012, Hangzhou, China, April 9-12, 2012. Proceedings. Volume 7232 of Lecture Notes in Computer Science, pages 170-181, Springer, 2012. [doi]
Abstract is missing.