Researchers at Université catholique de Louvain (UCLouvain) in Belgium and Imperial College London in the U.K. have developed a model to estimate how easy it would be to deanonymize an arbitrary dataset.
For example, they said a dataset with 15 demographic attributes "would render 99.98% of people in Massachusetts unique."
The model requires fewer attributes for smaller populations, and the researchers said if town-level data were included with those 15 demographic attributes, "it would not take much to re-identify people living in Harwich Port, MA, a city of fewer than 2,000 inhabitants."
The researchers said their results demonstrate that anonymization is not sufficient for private companies to avoid conflicts with laws such as Europe's General Data Protection Regulation, and the California Consumer Privacy Act.
They stressed the need “to move, from a legal and regulatory perspective, beyond the deidentification release-and-forget model.”
From The Guardian
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