Ravi Jhawar, Philip Inglesant, Nicolas Courtois, Martina Angela Sasse. Make mine a quadruple: Strengthening the security of graphical one-time PIN authentication. In Pierangela Samarati, Sara Foresti, Jiankun Hu, Giovanni Livraga, editors, 5th International Conference on Network and System Security, NSS 2011, Milan, Italy, September 6-8, 2011. pages 81-88, IEEE, 2011. [doi]
Abstract is missing.