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Privacy in geo-social networks: proximity notification with untrusted service providers and curious buddies

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Abstract

A major feature of the emerging geo-social networks is the ability to notify a user when any of his friends (also called buddies) happens to be geographically in proximity. This proximity service is usually offered by the network itself or by a third party service provider (SP) using location data acquired from the users. This paper provides a rigorous theoretical and experimental analysis of the existing solutions for the location privacy problem in proximity services. This is a serious problem for users who do not trust the SP to handle their location data and would only like to release their location information in a generalized form to participating buddies. The paper presents two new protocols providing complete privacy with respect to the SP and controllable privacy with respect to the buddies. The analytical and experimental analysis of the protocols takes into account privacy, service precision, and computation and communication costs, showing the superiority of the new protocols compared to those appeared in the literature to date. The proposed protocols have also been tested in a full system implementation of the proximity service.

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References

  1. Amir A., Efrat A., Myllymaki J., Palaniappan L., Wampler K.: Buddy tracking—efficient proximity detection among mobile friends. Pervasive Mob Comput 3(5), 489–511 (2007)

    Article  Google Scholar 

  2. Bettini C., Jajodia S., Samarati P., Wang X.S.: Privacy in Location-Based Applications, vol. 5599 of Lecture Notes in Computer Science. Springer, Heidelberg (2009)

    Book  Google Scholar 

  3. Bettini C., Wang X.S., Jajodia S.: Time Granularities in Databases, Data Mining, and Temporal Reasoning. Springer, Heidelberg (2000)

    MATH  Google Scholar 

  4. Bishop M.: Computer Security: Art and Science, Chap. 32. Addison-Wesley, Reading (2003)

    Google Scholar 

  5. Chon H. D., Agrawal D., El Abbadi A.: Range and knn query processing for moving objects in grid model. Mob Netw Appl 8(4), 401–412 (2003)

    Article  Google Scholar 

  6. Freni, D., Mascetti, S., Bettini, C.: Hide&Crypt: protecting privacy in proximity-based services. In: Proceedings of the 11th International Symposium on Spatial and Temporal Databases, vol. 5644 of Lecture Notes in Computer Science, pp. 441–444. Springer (2009)

  7. Gedik B., Liu L.: Protecting location privacy with personalized k-anonymity: architecture and algorithms. IEEE Trans. Mob. Comput. 7(1), 1–18 (2008)

    Article  Google Scholar 

  8. Ghinita, G., Damiani, M.L., Silvestri, C., Bertino, E.: Preventing velocity-based linkage attacks in location-aware applications. In: Proceedings of ACM International Symposium on Advances in Geographic Information Systems, pp. 246–255. ACM Press (2009)

  9. Ghinita, G., Kalnis, P., Khoshgozaran, A., Shahabi, C., Tan, K.-L.: Private queries in location based services: anonymizers are not necessary. In: Proceedings of SIGMOD, pp. 121–132. ACM Press (2008)

  10. Gruteser, M., Grunwald, D.: Anonymous usage of location-based services through spatial and temporal cloaking. In: Proceedings of the 1st International Conference on Mobile Systems, Applications and Services, pp. 31–42. The USENIX Association (2003)

  11. Jensen C.S., Lu H., Yiu M.L.: Location privacy techniques in client–server architectures. In: Bettini, C., Jajodia, S., Samarati, P., Wang, X.S. (eds) Privacy in Location-Based Applications, vol. 5599 of Lecture Notes in Computer Science, Springer, Heidelberg (2009)

    Google Scholar 

  12. Kalnis P., Ghinita G., Mouratidis K., Papadias D.: Preventing location-based identity inference in anonymous spatial queries. IEEE Trans. Knowl. Data Eng. 19(12), 1719–1733 (2007)

    Article  Google Scholar 

  13. Khoshgozaran, A., Shahabi, C.: Private buddy search: enabling private spatial queries in social networks. In: Symposium on Social Intelligence and Networking (2009)

  14. Khoshgozaran, A., Shahabi, C., Shirani-Mehr, H.: Location privacy: going beyond k-anonymity, cloaking and anonymizers. Knowl. Inf. Syst. (2010, to appear)

  15. Kido, H., Yanagisawa, Y., Satoh, T.: An anonymous communication technique using dummies for location-based services. In: Proceedings of the International Conference on Pervasive Services, pp. 88–97. IEEE Computer Society (2005)

  16. Mascetti, S., Bettini, C., Freni, D.: Longitude: centralized privacy-preserving computation of users’ proximity. In: Proceedings of 6th VLDB Workshop on Secure Data Management, Lecture Notes in Computer Science. Springer (2009)

  17. Mascetti S., Bettini C., Freni D., Wang X.S.: Spatial generalization algorithms for LBS privacy preservation. J. Locat. Based Serv. 1(3), 179–207 (2007)

    Article  Google Scholar 

  18. Mascetti, S., Bettini, C., Freni, D., Wang, X.S., Jajodia, S.: Privacy-aware proximity based services. In: Proceedings of the 10th International Conference on Mobile Data Management, pp. 31–40. IEEE Computer Society (2009)

  19. Mokbel, M.F., Chow, C.-Y., Aref, W.G.: The new casper: query processing for location services without compromising privacy. In: Proceedings of the 32nd International Conference on Very Large Data Bases, pp. 763–774. VLDB Endowment (2006)

  20. Papadopoulos, S., Bakiras, S., Papadias, D.: Nearest neighbor search with strong location privacy. In: Proceedings of the 36th International Conference on Very Large Data Bases (VLDB 2010) (2010)

  21. Ruppel, P., Treu, G., Küpper, A., Linnhoff-Popien, C.: Anonymous user tracking for location-based community services. In: Proceedings of the Second International Workshop on Location- and Context-Awareness, vol. LNCS 3987, pp. 116–133. Springer (2006)

  22. Peter, S.-A.: Extensible messaging and presence protocol (XMPP): core. RFC 3920, IETF (2004).

  23. Samarati P.: Protecting respondents’ identities in microdata release. IEEE Trans. Knowl. Data Eng. 13(6), 1010–1027 (2001)

    Article  Google Scholar 

  24. Šaltenis S., Jensen C.S., Leutenegger S.T., Lopez M.A.: Indexing the positions of continuously moving objects. SIGMOD Rec. 29(2), 331–342 (2000)

    Article  Google Scholar 

  25. Šikšnys, L., Thomsen, J.R., Šaltenis, S., Yiu, M.L.: Private and flexible proximity detection in mobile social networks. In: Proceedings of the 11th International Conference on Mobile Data Management, pp. 75–84 (2010)

  26. Šikšnys, L., Thomsen, J.R., Šaltenis, S., Yiu, M.L., Andersen, O.: A location privacy aware friend locator. In: Proceedings of the 11th International Symposium on Spatial and Temporal Databases, vol. 5644 of Lecture Notes in Computer Science, pp. 405–410. Springer (2009)

  27. Wang, S., Wang, X.S.: Anontwist: Nearest neighbor querying with both location privacy and k-anonymity for mobile users. In: Proceedings of the 3rd International Workshop on Privacy-Aware Location-Based Mobile Services, pp. 443–448. IEEE Computer Society (2009)

  28. Yiu, M.L., Jensen, C.S., Huang, X., Lu, H.: SpaceTwist: managing the trade-offs among location privacy, query performance, and query accuracy in mobile services. In: Proceedings of the 24th International Conference on Data Engineering, pp. 366–375. IEEE Computer Society (2008)

  29. Yiu, M.L., Hou,L.U. Šaltenis, S., Tzoumas, K.: Efficient proximity detection among mobile users via self-tuning policies. In: Proceedings of the 36th International Conference on Very Large Data Bases (2010)

  30. Zhong, G., Goldberg, I., Hengartner, U., Louis, L., Pierre: Three protocols for location privacy. In: Privacy Enhancing Technologies, vol. LNCS 4776, pp. 62–76. Springer (2007)

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Correspondence to X. Sean Wang.

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Mascetti, S., Freni, D., Bettini, C. et al. Privacy in geo-social networks: proximity notification with untrusted service providers and curious buddies. The VLDB Journal 20, 541–566 (2011). https://doi.org/10.1007/s00778-010-0213-7

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  • DOI: https://doi.org/10.1007/s00778-010-0213-7

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