A Billion Keys, but Few Locks: The Crisis of Web Single Sign-On - San-Tsai Sun et al - San-Tsai Sun, Yazan Boshmaf, Kirstie Hawkey, and Konstantin Beznosov. A Billion Keys, but Few Locks: The Crisis of Web Single Sign-On. In Proceedings of the New Security Paradigms Workshop (NSPW), September 20-22, 2010. : - LERSSE-RefConfPaper-2010-006