  The Internet of Things (IoT) is expected to generate large amounts of
heterogeneous data from diverse sources including physical sensors, user
devices, and social media platforms. Over the last few years, significant
attention has been focused on personal data, particularly data generated by
smart wearable and smart home devices. Making personal data available for
access and trade is expected to become a part of the data driven digital
economy. In this position paper, we review the research challenges in building
personal Databoxes that hold personal data and enable data access by other
parties, and potentially thus sharing of data with other parties. These
Databoxes are expected to become a core part of future data marketplaces.
