香港网络安全事故协调中心（HKCERT）：2025年物联网数码显示屏保安研究报告（英文版）

Digital signage systems are usually set up in wireless networks, with signage devices often running Android or Windows operating systems. Users can update the display content by accessing the signage or content management system (CMS) to upload media, adjust screen settings, and setup schedule etc. After the content is saved in the management system, it is sent to the signage device for display. A diagram typically illustrates this content update process from the user to the signage device.