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Supporting Data Privacy in P2P Systems

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Security and Privacy Preserving in Social Networks

Abstract

Peer-to-Peer (P2P) systems have been very successful for large-scale data sharing. However, sharing sensitive data, like in online social networks, without appropriate access control, can have undesirable impact on data privacy. Data can be accessed by everyone (by potentially untrusted peers) and used for everything (e.g., for marketing or activities against the owner’s preferences or ethics). Hippocratic databases (HDB) provide an effective solution to this problem, by integrating purpose-based access control for privacy protection. However, the use of HDB has been restricted to centralized systems. This chapter gives an overview of current solutions for supporting data privacy in P2P systems and develops in more detail a complete solution based on HDB.

Work partially funded by the DataRing project of the French ANR.

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Notes

  1. 1.

    Organization for Economic Co-operation and Development. One of the world’s largest and most reliable source of comparable statistics on economic and social data (http://www.oecd.org/).

  2. 2.

    www.shanoir.org/.

  3. 3.

    http://www.medscape.com/connect/.

  4. 4.

    http://www.carenity.com.

  5. 5.

    http://diybio.org.

  6. 6.

    http://office.microsoft.com/en-us/sharepoint-workspace.

  7. 7.

    http://usenet-news.net/.

  8. 8.

    http://antsp2p.sourceforge.net/.

  9. 9.

    http://mute-net.sourceforge.net.

  10. 10.

    These systems are not meant for massive data sharing, thus information about data disclosure for requesters is not available.

  11. 11.

    Anonymizer is an online service that attempts to make activity on the Internet untraceable. It accesses the Internet on the user’s behalf, protecting personal information by hiding the source identifying information. http://www.anonymizer.com/.

  12. 12.

    Freenet does not use access control techniques thus key distribution is not restricted.

  13. 13.

    Microsoft kept their right to collect some information about the use of the Office SharePoint Workspace software and other activities “outside” of workspaces, as explained in their privacy statement at http://office.microsoft.com/en-us/help/privacy-supplement-for-microsoft-office-groove-2007-HA010085213.aspx.

  14. 14.

    In [5, 35], authors have treated peer identification. We are fully aware of the impact of identification on user privacy. However, peer identities do not necessarily reveal users real identities, thus user privacy can be somehow protected.

  15. 15.

    To distinguish data keys from peer keys, we prefix peer keys with letter P.

  16. 16.

    http://www.oasis-opencsa.org/sca http://www.obeo.fr/pages/sca/.

  17. 17.

    http://peerunit.gforge.inria.fr/.

  18. 18.

    http://www.grid5000.fr/.

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Correspondence to Mohamed Jawad .

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Jawad, M., Serrano-Alvarado, P., Valduriez, P. (2013). Supporting Data Privacy in P2P Systems. In: Chbeir, R., Al Bouna, B. (eds) Security and Privacy Preserving in Social Networks. Lecture Notes in Social Networks. Springer, Vienna. https://doi.org/10.1007/978-3-7091-0894-9_7

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  • DOI: https://doi.org/10.1007/978-3-7091-0894-9_7

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