Over
the last decade, the volume of data that governments and private
corporations collect from citizens has been eclipsed by the data
produced by individuals, as photos, videos, and messages on online
social platforms, and also the data produced by large scale networks
of sensors that monitor traffic, weather, and industrial systems. Web
users are increasingly recognising the risks of handing over
data-mining rights to a very small group of organisations, whist
getting very little in return. The pressure is on to develop robust
solutions that not only deliver value, but also address concerns
about data ownership, privacy, and the threat of data theft and
abuse.