Fotis Chantzis has been a member of the main Nmap development team since 2009, when he wrote Ncrack under the mentorship of Fyodor, the original author of Nmap, during Google Summer of Code 2009 and 2010. He also represented Nmap at the Google Mentor Summit in October 2016. His work includes exploiting the TCP Persist Timer to magnify the effect of a classic network attack (paper published on Phrack #66), the development of Ncrack, a high-speed network authentication tool with a dynamic and optimized timing engine under the Nmap toolset and inventing a new stealthy port scanning attack by abusing the popular XMPP.