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Design of a P2P network that protects users’ privacy in front of Web Search Engines

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Issue date
2015
Author
Romero-Tris, Cristina
Castellà Martínez, Damià
Viejo Galicia, Alexandre
Castellà Roca, Jordi
Solsona Tehàs, Francesc
Mateo-Sanz, Josep María
Suggested citation
Romero-Tris, Cristina; Castellà Martínez, Damià; Viejo Galicia, Alexandre; Castellà Roca, Jordi; Solsona Tehàs, Francesc; Mateo-Sanz, Josep María; . (2015) . Design of a P2P network that protects users’ privacy in front of Web Search Engines. Computer Communications, 2015, vol. 57, p. 37-49. https://doi.org/10.1016/j.comcom.2014.09.003.
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Abstract
Web Search Engines store and analyze queries made by their users in order to build their profiles and offer them personalized search results (i.e., results are ranked according to each user’s preferences). Even though this service is positive for the users, their profiles may contain sensitive information that can threaten their privacy. Literature in this field stresses the existence of a trade-off between the level of privacy achieved and the quality of service received. Current proposals try to maximize this trade-off, yet we argue that there is still room for improvement. In this paper, we present a new approach which improves the trade-off by grouping users who share similar profiles. Moreover, our new proposal is based on a hybrid P2P architecture that outperforms current schemes in terms of scalability. The proposed system has been tested in terms of performance and privacy achieved, using real data from the AOL dataset. Simulation results show that: (i) the system protects users’ privacy when they behave honestly, and penalizes selfish users; (ii) it supports a large number of users; (iii) the runtime required to group users is affordable; and (iv) groups are dynamic and their topology is unpredictable, which we argue that is positive from the privacy point of view.
URI
http://hdl.handle.net/10459.1/57186
DOI
https://doi.org/10.1016/j.comcom.2014.09.003
Is part of
Computer Communications, 2015, vol. 57, p. 37-49
European research projects
Collections
  • Grup de Recerca en Computació Distribuïda (INSPIRES) [51]
  • Articles publicats (Informàtica i Enginyeria Industrial) [753]
  • Publicacions de projectes de recerca del Plan Nacional [2170]

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