I am the Albert Bradley 1915 Third Century Professor and Chair of Computer Science at Dartmouth. My research focuses on digital forensics, image analysis, and human perception. I received my undergraduate degree in Computer Science and Applied Mathematics from the University of Rochester in 1989 and my Ph.D. in Computer Science from the University of Pennsylvania in 1997. Following a two year post-doctoral fellowship in Brain and Cognitive Sciences at MIT, I joined the faculty at Dartmouth in 1999. I am the recipient of a Alfred P. Sloan Fellowship, a John Simon Guggenheim Fellowship, and I am a fellow of the National Academy of Inventors. I am also the Chief Technology Officer and co-founder of Fourandsix Technologies and a Senior Advisor to the Counter Extremism Project.