Foundations and Practice of Security : 5th International Symposium on Foundations and Practice of Security, FPS 2012, Montreal, QC, Canada, October 25-26, 2012, Revised Selected Papers - Joaquin Garcia-Alfaro, Frédéric Cuppens, Nora Cuppens-Boulahia, Ali Miri, Nadia Tawbi ((Lecture Notes in Computer Science))