A reflective marker is a specially designed dot, sticker, or tag that reflects light back to its source. In cybersecurity and physical security contexts, these markers are often used in conjunction with optical scanners or cameras to track the position and movement of objects or individuals. By bouncing back light, reflective markers enable accurate detection and identification, which can enhance security measures such as access control, asset tracking, or surveillance. Their use is common in environments where precise monitoring is required, such as secure facilities, warehouses, or during the transportation of sensitive materials.