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Identity disclosure occurs when an adversary is able to determine the mapping from a user v in the social network to a specific real-world entity p. Before we are able to provide a formal definition of identity disclosure, let us consider three questions related to the identity of p in which an adversary may be interested.

Definition 3.1 Mapping query. For a particular individual p, find which user vV in a social network maps to p. Return v.

Definition 3.2 Existence query. For a particular indiv...


Cover of Privacy in Social Networks


self type definition