CCIS Seminar - Tuesday 12 January 2010 - CTL
14:00:00 - Salle de CTL

Hugo Jonker, University of Luxembourg, SaToSS) research group

Quantifying Voter-controlled Privacy

Abstract: Privacy is a necessary requirement for voting. Without privacy, voters can be forced to vote in specific ways, and the forcing party can check their compliance. But offering privacy does not suffice: if a voter can reduce her privacy, an attacker can force her to do so. We introduce the notion of choice groups as a measure of privacy, and provide formal definitions. We illustrate how this notion can be used to better understand privacy concerns in voting systems, and how the notion of choice groups is formalised to quantify privacy. By combining this with models of various degrees of voter collaboration, we can quantify the privacy under a voter\'s control.

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