How is the rewiring of communication in the network age changing how we deceive and trust one another? How can we trust that news story, or a hotel’s online review, or that text message about someone being on their way? In this talk we’ll go over how principles from psychology and communication intersect deception and trust with technology. We’ll cover the state-of-the-art in deception detection research, explore some new forms of deception and discuss concerns of a post-truth society, and examine how different technologies affect both how we lie and trust online. The talk reveals several key principles that can guide how we can think about truth and trust on the Internet.