1. An information device comprising: a fingerprint image capture section which captures a fingerprint image; a comparison section which compares a first fingerprint image captured by the fingerprint image capture section with a second fingerprint image captured by the fingerprint image capture section at a given time interval after the first fingerprint image is captured; an image generation section which generates an image based on the comparison result of the comparison section; and a display section which displays the image generated by the image generation section.