Competing face recognition technologies have been under development for a number of years, but now two are starting to emerge as the leaders: local feature analysis, developed by Joseph Atick, who founded Jersey City, NJ-based Visionics; and eigenface, first demonstrated at Helsinki University of Technology, later developed at MIT, and currently marketed by Viisage Technology of Littleton, MA. It looks like the only way to defeat this technology is with a serious bar fight. More Here