DIGITAL SIGNAGE SYSTEM, INFORMATION TERMINAL, AND DIGITAL SIGNAGE DEVICE

This digital signage system includes an information terminal and a digital signage device. The digital signage device includes a storage, a transmitter, a content acquirer, a display, and a display controller. The storage stores therein identification information of the digital signage device. The transmitter transmits the identification information to the information terminal. The display controller causes the display to display an image based on the acquired content data. The information terminal includes a receiver, an authenticator, and a relay. The receiver receives the identification information transmitted from the digital signage device. The authenticator authenticates the digital signage device using the received identification information. Upon the digital signage device being authenticated by the authenticator, the relay relays communication between a content server and the digital signage device. The content acquirer acquires content data corresponding to the identification information from the content server via the relay.