A Trajectory Substitution Privacy Protection Scheme in location-based services

• Cheng Song,
• Yadong Zhang,
• Xinan Gu,
• Lei Wang,
• Zhizhong Liu,

Vol. 13, No. 9, September 29, 2019
10.3837/tiis.2019.09.024, Download Paper (Free):

• similar trajectory
• Privacy Protection
• query substitution
• LBS

Abstract

Aimed at the disclosure risk of mobile terminal user’s location privacy in location-based services, a location-privacy protection scheme based on similar trajectory substitution is proposed. On the basis of the anonymized identities of users and candidates who request LBS, this scheme adopts trajectory similarity function to select the candidate whose trajectory is the most similar to user’s at certain time intervals, then the selected candidate substitutes user to send LBS request, so as to protect user’s privacy like identity, query and trajectory. Security analyses prove that this scheme is able to guarantee such security features as anonymity, non-forgeability, resistance to continuous query tracing attack and wiretapping attack. And the results of simulation experiment demonstrate that this scheme remarkably improve the optimal candidate’ trajectory similarity and selection efficiency.

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