Does differential privacy protect terry gross' privacy?

Authors:
Krish Muralidhar;Rathindra Sarathy
Affiliations:
University of Kentucky, Lexington, KY;Oklahoma State University, Stillwater, OK
Venue:
PSD'10 Proceedings of the 2010 international conference on Privacy in statistical databases
Year:
2010

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Abstract

The concept of differential privacy was motivated through the example of Terry Gross' height in Dwork (2006). In this paper, we show that when a procedure based on differential privacy is implemented, it neither protects Terry Gross' privacy nor does it provide meaningful responses to queries. We also provide an additional illustration using income data from the US Census. These illustrations raise serious questions regarding the efficacy of using differential privacy based masking mechanism for numerical data.