Information processing device, mobile terminal, and program

An information processing device that receives and processes posting information, as well as position information, from a mobile terminal. The position information includes first position information, which indicates a first position of the mobile terminal when a user enters an information posting intention into the mobile terminal, and second position information which indicates a second position of the mobile terminal when the user enters an information posting instruction into the mobile terminal. The information processing device determines position information to be associated with the posting information, based on at least one of a difference between the first position and the second position and a difference between a first point-in-time at which the mobile terminal is positioned at the first position and a second point-in-time at which the mobile terminal is positioned at the second position.