Yongdong Wu, Zhigang Zhao. Enhancing the Security of On-line Transactions with CAPTCHA Keyboard. In Dimitris Gritzalis, Steven Furnell, Marianthi Theoharidou, editors, Information Security and Privacy Research - 27th IFIP TC 11 Information Security and Privacy Conference, SEC 2012, Heraklion, Crete, Greece, June 4-6, 2012. Proceedings. Volume 376 of IFIP Advances in Information and Communication Technology, pages 531-536, Springer, 2012. [doi]
Abstract is missing.