Netinfo Security ›› 2024, Vol. 24 ›› Issue (4): 602-613.doi: 10.3969/j.issn.1671-1122.2024.04.010

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Research on 3D-Location Privacy Publishing Algorithm Based on Policy Graph

YIN Chunyong(), JIA Xukang   

  1. School of Computer Science, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2023-09-21 Online:2024-04-10 Published:2024-05-16

Abstract:

With the popularization of mobile smart terminals, the application of location-based services has seen explosive growth, and high-rise indoor buildings are one of the important application scenarios of LBS. However, most of the existing location privacy protection algorithms are applicable to 2D location data. The research on location privacy protection for large indoor 3D scenes is still insufficient and lacks personalizable 3D privacy policies. To address this problem, this paper proposed a 3D-location privacy publishing algorithm based on policy graph. Firstly, a customizable policy graph-based location privacy protection framework was designed, which could dynamically customize suitable privacy policies according to specific scene requirements. Secondly, two 3D-oriented differential privacy variant mechanisms were designed in combination with customized policy graph to realize location privacy protection in 3D scenes. Finally, simulation experiments were conducted on 3D datasets. The results demonstrate that, compared to other 3D location privacy preserving algorithms, the proposed algorithm has better stability and utility.

Key words: high-rise indoor scenes, 3D-location privacy, policy graph, differential privacy, location-based services

CLC Number: