The term internet of things (IoT) is often defined in a variety of different ways but typically refers to electronic devices and systems (e.g., toaster ovens and wearable sensors) with added computational capabilities and Internet connectivity. The IoT introduces new security concerns that must be addressed at an early stage of the IoT design. Since security operations such as encryption and authentication are often resource hungry, solutions are needed that provide reasonable levels of security with minimal area and power consumption. Emerging nanoscale technologies are also being developed and require very low area utilization and low power consumption, important features for the IoT. In this article, we present a few examples of security systems built from nanoscale electronic devices that could provide solutions for low resource security in emerging IoT devices.