What does this device do?

This paper describes the Trusted Tiny Things project which is investigating some of the challenges inherit in making the Internet of Things (IoT) more transparent to users. We present a semantic framework for reasoning about the capabilities of IoT devices based on provenance information collected from devices and their associated services. As part of this framework we have developed a semantic model, services and a smartphone app to represent, store and query IoT provenance. The semantic model and app was informed via a series of participatory design activities with users. In this paper we discuss the use of the system with two distinct IoT devices: an NFC tag used at bus stops to provide a means to access real-time bus timetables, and a blackbox device installed into vehicles by insurance companies to track driving behaviour.