Bloomberg Law: Privacy & Data Security brings you single-source access to the expertise of Bloomberg Law’s privacy and data security editorial team, contributing practitioners,...
By Jimmy H. Koo
Oct. 29 — The National Institute of Standards and Technology recently released the final draft of its report, De-Identification of Personal Information, summarizing two decades of de-identification research and discussing current practices.
The report, however, didn't make recommendations regarding the “appropriateness of de-identification” or specific algorithms.
“De-identification techniques are intended to remove identifying information from a dataset while retaining some utility in the remaining data,” the report said. De-identification isn't a single technique, but a collection of approaches, tools and algorithms. “In general,” it said, “privacy protection improves as more aggressive de-identification techniques are employed, but less utility remains in the resulting dataset.”
Being able to effectively de-identity personally identifying information is a central requirement for the protection of privacy when utilizing big data analytics.
The report warned that a variety of problems can result from distribution or use of de-identified data, including re-identifying the de-identified data. However, risks to individuals exist in de-identified data, the NIST report said. Some of the risks include inferences about individuals in the data without re-identification.
Concluding that there's “comparatively little known” about de-identification, the report said there's a need for “standards and assessment techniques that can measurably address the breadth of data and risks.”
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