Sabrina De Capitani di Vimercati Sara Foresti Sushil Jajodia Stefano Paraboschi Pierangela Samarati 311-322 2008 ACM Conference on Computer and Communications Security http://doi.acm.org/10.1145/1455770.1455810 conf/ccs/2008 db/conf/ccs/ccs2008.html#VimercatiFJPS08