Gordon Lyon (also known by his pseudonym Fyodor Vaskovich) is an American network security expert, creator of Nmap and author of books, websites, and technical papers about network security. He is a founding member of the Honeynet Project and was Vice President of Computer Professionals for Social Responsibility.
Lyon has been active in the network security community since the mid-1990s. His handle, "Fyodor", was taken from Russian author Fyodor Dostoyevsky. Most of his programming is done in the C, C++, and Perl programming languages.
In December 2011, Lyon published a post criticizing the fact that Download.com started bundling grayware with their installation managers and expressing concerns users confusing Download.com-offered content for software offered by original authors; he accused them of using deception as well as copyright and trademark violation.
Lyon has presented at DEFCON, CanSecWest, FOSDEM, IT Security World, Security Masters' Dojo, ShmooCon, IT-Defense, SFOBug, and other security conferences.
Lyon maintains several network security web sites: