It’s a camera and stickers like this one of many odd DEFCON traditions. (Security professionals in large numbers is an interesting sight to behold.)
Edit: Unrelated bit of history from the time: This also was the DEFCON where Marcus Hutchins was arrested. The fool come rolling in driving a Lambo for some reason so we kinda figured something was up.
Occupancy or fire sensor? Or maybe it is a camera and the sign is a lie
It’s a camera and stickers like this one of many odd DEFCON traditions. (Security professionals in large numbers is an interesting sight to behold.)
Edit: Unrelated bit of history from the time: This also was the DEFCON where Marcus Hutchins was arrested. The fool come rolling in driving a Lambo for some reason so we kinda figured something was up.