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When Differential Privacy Implies Syntactic Privacy
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DOI：10.1109/TIFS.2022.3177953.png)
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摘要
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Two main privacy models for sanitising datasets are differential privacy (DP) and syntactic privacy. The former restricts individual values' impact on the output based on the dataset while the latter restructures the dataset before publication to link any record to multiple sensitive data values. Besides both providing mechanisms to sanitise data, these models are often applied independently of each other and very little is known regarding how they relate. Knowing how privacy models are related can help us develop a deeper understanding of privacy and can inform how a single privacy mechanism can fulfil multiple privacy models. In this paper, we introduce a framework that determines if the privacy mechanisms of one privacy model can also guarantee privacy for another privacy model. We apply our framework to understand the relationship between DP and a form of syntactic privacy called t-closeness. We demonstrate, for the first time, how DP and t-closeness can be interpreted in terms of each other by introducing generalisations and extensions of both models to explain the transition from one model to the other. Finally, we show how applying one mechanism to guarantee multiple privacy models increases data utility compared to applying separate mechanisms for each privacy model.
Keyword:
Privacy
differential privacy
t-closeness
syntactic privacy
期刊
IF:
8
论文数:
5.3K
被引数:
2.3W
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