Minimizing Disclosure Risk in HHS Open Data Initiatives. B. Restricted Data for Public Access


Public use microdata play a critical role in research and policy analysis. Exploratory research and many types of policy analysis do not lend themselves well to the conditions that govern restricted access as described above. The creation of public use data that protect the confidentiality of the subjects begins with de-identification, but depending on the contents of the data and the characteristics of the subjects, it may require the application of a number of additional techniques to reduce the risk of re-identification to a satisfactory level—that is, produce true anonymization.

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