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Statistical Analysis and Data Mining The ASA Data Science Journal
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Distribution‐preserving k‐anonymity

Distribution-preserving \(k\)-anonymity
Authors: Dennis Wei; Karthikeyan Natesan Ramamurthy; Kush R. Varshney;

Distribution‐preserving k‐anonymity

Abstract

Preserving the privacy of individuals by protecting their sensitive attributes is an important consideration during microdata release. However, it is equally important to preserve the quality or utility of the data for at least some targeted workloads. We propose a novel framework for privacy preservation based on the k‐anonymity model that is ideally suited for workloads that require preserving the probability distribution of the quasi‐identifier variables in the data. Our framework combines the principles of distribution‐preserving quantization and k‐member clustering, and we specialize it to 2 variants that respectively use intra‐cluster and Gaussian dithering of cluster centers to achieve distribution preservation. We perform theoretical analysis of the proposed schemes in terms of distribution preservation, and describe their utility in workloads such as covariate shift and transfer learning where such a property is necessary. Using extensive experiments on real‐world Medical Expenditure Panel Survey data, we demonstrate the merits of our algorithms over standard k‐anonymization for a hallmark health care application where an insurance company wishes to understand the risk in entering a new market. Furthermore, by empirically quantifying the reidentification risk, we also show that the proposed approaches indeed maintain k‐anonymity.

Keywords

microdata release, FOS: Computer and information sciences, Computer Science - Machine Learning, Statistics, k-member clustering, Machine Learning (stat.ML), dithering, transfer learning, privacy, Computer science, health care, supervised learning, Machine Learning (cs.LG), covariate shift, Statistics - Machine Learning, Rosenblatt's transformation, distribution preservation, reidentifcation risk

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    6
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Top 10%
Average
Top 10%
Green
bronze