“Smart” cities are built on a foundation of sensors that regulate traffic lights, radiation sensors, and water levels. These sensors allow for data aggregation and powerful analysis to improve operations, but also pose a high risk of manipulation. These targets are also the focus of many nation state attackers, with Russian-sponsored hackers targeting the U.S. power grid and election infrastructure providing the best known examples.
Source: The Sensors That Power Smart Cities Are a Hacker’s Dream | WIRED