The very feature that makes cameras useful—constant recording—is the source of profound privacy risks. The paradox is simple: you buy a camera to feel safer, but you may inadvertently create new vulnerabilities.

The global market for home security cameras is booming. From doorbell cams that alert you to a package delivery to PTZ (pan-tilt-zoom) indoor cameras that let you check on your pets, these devices have become a cornerstone of modern smart homes. They promise peace of mind, crime deterrence, and instant alerts.

Then Leo noticed the car.