Interest in the Internet of Things is booming, in the home, the office and the supply chain. It doesn’t feature any technologies that are revolutionary in themselves — sensors, motors, cameras, servers, internet connectivity, Bluetooth and mobile applications are all standard fare. But assembling them into giant networks that can monitor everything from doorways to energy usage to global supply chains is new. And sometimes it goes wrong. How does that happen, what are the consequences, and what can organizations do to prevent it?