Matthew Van Gundy Hao Chen Zhendong Su Giovanni Vigna Feature Omission Vulnerabilities: Thwarting Signature Generation for Polymorphic Worms. 74-85 2007 ACSAC http://doi.ieeecomputersociety.org/10.1109/ACSAC.2007.25 conf/acsac/2007 db/conf/acsac/acsac2007.html#GundyCSV07