Towards Privacy-Preserving Location Sharing over Mobile Online Social Networks

Juan CHEN  Shen SU  Xianzhi WANG  

IEICE TRANSACTIONS on Information and Systems   Vol.E102-D   No.1   pp.133-146
Publication Date: 2019/01/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2018EDP7187
Type of Manuscript: PAPER
Category: Information Network
privacy-preserving protocol,  location sharing,  mOSNs,  system architecture,  

Full Text: FreePDF(1.4MB)

Location sharing services have recently gained momentum over mobile online social networks (mOSNs), seeing the increasing popularity of GPS-capable mobile devices such as smart phones. Despite the convenience brought by location sharing, there comes severe privacy risks. Though many efforts have been made to protect user privacy during location sharing, many of them rely on the extensive deployment of trusted Cellular Towers (CTs) and some incur excessive time overhead. More importantly, little research so far can support complete privacy including location privacy, identity privacy and social relation privacy. We propose SAM, a new System Architecture for mOSNs, and P3S, a Privacy-Preserving Protocol based on SAM, to address the above issues for privacy-preserving location sharing over mOSNs. SAM and P3S differ from previous work in providing complete privacy for location sharing services over mOSNs. Theoretical analysis and extensive experimental results demonstrate the feasibility and efficiency of the proposed system and protocol.