3 G. Giacinto R. Perdisci F. Roli 2005 Network Intrusion Detection by Combining One-class Classifiers F. Roli, S. Vitulano 13th International Conference on Image Analysis and Processing (ICIAP 2005) Cagliari, Italy Springer-Verlag 3617 58-65 LNCS Intrusion Detection Computer Security Multiple Classifier Systems ids00 mcs00