Impossibility of Differentially Private Universally Optimal Mechanisms
Impossibility of Differentially Private Universally Optimal Mechanisms
The notion of universally utility-maximizing privacy mechanism was recently introduced by Ghosh, Rough garden, and Sundararajan [STOC 2009]. These are mechanisms that guarantee optimal utility to a large class of information consumers, simultaneously, while preserving Differential Privacy [Dwork, McSherry, Nissim, and Smith, TCC 2006]. Ghosh, Rough garden and Sundararajan have …