Meanwhile, analysis of publicly available data set - including unstructured sets from Facebook, Twitter and blogs - could assist government, he said. However, government must "use it within the structures of the Privacy Act" and other laws.
"What happens for instance when a government agency accesses a data set from another agency and that other agency has placed that data set in the public domain?"
Mashing up the two agencies data "will very likely give you some additional insights, but it may raise some concerns in the minds of citizens" that it may not be "an appropriate use of that public data."
"We know that this could be a problem, and we need to make sure that agencies think about it and how best to manage this risk."
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