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Abstract—We address the problem of query profile obfuscation by means of partial query exchanges between two users, in order for
their profiles of interest to appear distorted to the information provider (database, search engine, etc.). We illustrate a methodology to
reach mutual privacy gain, that is, a situation where both users increase their own privacy protection through collaboration in query
exchange. To this end, our approach starts with a mathematical formulation, involving the modeling of the users’ apparent profiles as
probability distributions over categories of interest, and the measure of their privacy as the corresponding Shannon entropy. The
question of which query categories to exchange translates into finding optimization variables representing exchange policies, for
various optimization objectives based on those entropies, possibly under exchange traffic constraints.
CitationRebollo-Monedero, D.; Forné, J.; Domingo-Ferrer, J. Query profile obfuscation by means of optimal query exchange between users. "IEEE transactions on dependable and secure computing", Setembre 2012, vol. 9, núm. 5, p. 641-654.
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