1. A method comprising: identifying, via one or more processors executing computer program instructions that are stored in at least one memory, a visual representation of a human user for display within one or more graphical user interfaces to others interacting with the human user over a network; and calculating, via one or more processors executing computer program instructions that are stored in at least one memory, an authenticity score defining a degree of resemblance between the visual representation of the human user and physical characteristics of the human user.