Silvio developed a signature based Malware detection system using control flow graphs as features for his Masters work. Two academic papers were published during this time. He continues the work on malware classification in his PhD. The work is distinguished from previous research by being able to approach the speed and efficiency of traditional Antivirus, yet with the significantly increased effectiveness of using control flow based signatures. Control flow is seen a more accurate identifier of malware variants and relies on fingerprinting program structure instead of the byte-level content. The system is designed to scale for potential applications including desktop Antivirus, E-Mail and Internet gateways.