There is provided an information processing device including a first motion body that is a target for imaging performed by another information processing device, a detection unit configured to detect motion of the first motion body, and an authentication unit configured to decide whether to authenticate the another information processing device on the basis of a motion state of the first motion body that has been estimated by the another information processing device on the basis of a captured image acquired through the imaging and a motion state of the first motion body that has been detected by the detection unit.