Dick O'Brien Rick Smith Tammy Kappel Clint Bitzer Intrusion Tolerance Via Network Layer Controls. 90-96 2003 conf/discex/2003 DISCEX (1) http://doi.ieeecomputersociety.org/10.1109/DISCEX.2003.1194875 db/conf/discex/discex2003.html#OBrienSKB03