Warehouse workers suffer from an unusually high rate of injury. Now, at some facilities, workers can wear a sensor on their chest, which buzzes when they’re at risk of getting hurt. But this tracking device also gathers detailed information about the employee’s movements – and sends this data to their employer. This week on Decrypted, Bloomberg Technology’s Joshua Brustein looks at a new technology, whose proponents say will make workplaces safer, but also inspires concern about workplace surveillance.