Even when you are fast asleep in a pitch-black house, your personal data is wide awake and working against you. From the smartwatch tracking your heart rate to the smartphone silently pinging cell towers, a vast network of sensors is constantly harvesting your most intimate details. Inside your home, smart meters monitor your electrical usage to deduce your daily routines, while doorbell cameras, smart speakers, and televisions quietly record your physical environment and viewing habits. Companies are legally extracting this continuous stream of information, turning private bedrooms and living rooms into silent surveillance grids that feed massive corporate databases.