Coprivacy: an introduction to the theory and applications of co-operative privacy

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Document typeArticle
Defense date2011
PublisherInstitut d'Estadística de Catalunya
Rights accessOpen Access
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Abstract
We introduce the novel concept of coprivacy or co-operative privacy to make privacy preservation
attractive. A protocol is coprivate if the best option for a player to preserve her privacy is to help
another player in preserving his privacy. Coprivacy makes an individual’s privacy preservation a
goal that rationally interests other individuals: it is a matter of helping oneself by helping someone
else. We formally define coprivacy in terms of Nash equilibria. We then extend the concept to:
i) general coprivacy, where a helping player’s utility (i.e. interest) may include earning functionality
and security in addition to privacy; ii) mixed coprivacy, where mixed strategies and mixed Nash
equilibria are allowed with some restrictions; iii) correlated coprivacy, in which Nash equilibria are
replaced by correlated equilibria. Coprivacy can be applied to any peer-to-peer (P2P) protocol.
We illustrate coprivacy in P2P anonymous keyword search, in content privacy in social networks,
in vehicular network communications and in controlled content distribution and digital oblivion
enforcement
CitationDomingo-Ferrer, Josep. Coprivacy: an introduction to the theory and applications of co-operative privacy. "SORT", Special Issue, p. 25-40.
ISSN1696-2281
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