Navigational path privacy protection

Ken C.K. Lee, Wang Chien Lee, Hong Va Leong, Baihua Zheng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

17 Citations (Scopus)

Abstract

Navigational path query, one of the most popular location-based services (LBSs), determines a route from a source to a destination on a road network. However, issuing path queries to some non-trustworthy service providers may pose privacy threats to the users. For instance, given a query requesting for a path from a residential address to a psychiatrist, some adversaries may deduce "who is related to what disease". In this paper, we present an obfuscator framework that reduces the likelihood of path queries being revealed, while supporting different user privacy protection needs and retaining query evaluation efficiency. The framework consists of two major components, namely, an obfuscator and an obfuscated path query processor. The former formulates obfuscated path queries by intermixing true and fake sources and destinations and the latter facilitates efficient evaluation of the obfuscated path queries in an LBS server. The framework supports three types of obfuscated path queries, namely, independent obfuscated path query, shared obfuscated path query, and anti-collusion obfuscated path query. Our proposal strikes a balance between privacy protection strength and query processing overheads, while enhancing privacy protection against collusion attacks. Finally, we validate the proposed ideas and evaluate the performance of our framework based on an extensive set of empirical experiments.
Original languageEnglish
Title of host publicationACM 18th International Conference on Information and Knowledge Management, CIKM 2009
Pages691-700
Number of pages10
DOIs
Publication statusPublished - 1 Dec 2009
EventACM 18th International Conference on Information and Knowledge Management, CIKM 2009 - Hong Kong, Hong Kong
Duration: 2 Nov 20096 Nov 2009

Conference

ConferenceACM 18th International Conference on Information and Knowledge Management, CIKM 2009
Country/TerritoryHong Kong
CityHong Kong
Period2/11/096/11/09

Keywords

  • Path search
  • Privacy protection
  • Road network

ASJC Scopus subject areas

  • Decision Sciences(all)
  • Business, Management and Accounting(all)

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