JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2017, Vol. 52 ›› Issue (5): 75-84.doi: 10.6040/j.issn.1671-9352.2.2016.203

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Aparameterized location privacy protection method based on two-level Anonymity

BI Xiao-di1,2, LIANG Ying1, SHI Hong-zhou1, TIAN Hui3   

  1. 1. Research Center for Ubiquitous Computing Systems, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100190, China;
    3. China Academy of Telecommunication Research of MIIT, Beijing 100142, China
  • Received:2016-08-18 Online:2017-05-20 Published:2017-05-15

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Abstract: Location based service brings the challenging problem of privacy leakage. The method proposes a parameterized location privacy protection method based on two-level anonymity for the problem. The system applies the k-anonymity and differential privacy methods with customized protection level for different users. This method selects the k-1 anonymous coordinates from the set, which achieves the best probability likelihood of the request, using location entropy based k-anonymity algorithm according to users’ protection level. Moreover, the system propose a differential privacy based method to generate a dummy position which is indistinguishable and in proper distance with the real position. The experiment results show that our method can protect users’ privacy as well as preserving the accuracy of location based service.

Key words: location privacy protection, k-anonymity, location based service, privacy level, differential privacy

CLC Number: 

  • TP311
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