Volume 4 - Issue 1
MobiShare+: Security Improved System for Location Sharing in Mobile Online Social Networks
- Jingwei Li
Nankai University, Tianjin, China
lijw1987@gmail.com
- Jin Li
Guangzhou University, Guangzhou, China
jinli71@gmail.com
- Xiaofeng Chen
Xidian University, Xian, China
xfchen@xidian.edu.cn
- Zheli Liu
Nankai University, Tianjin, China
liuzheli1978@163.com
- Chunfu Jia
Nankai University, Tianjin, China
cfjia@nankai.edu.cn
Keywords: Mobile cloud computing, online social network, location privacy
Abstract
With the development of real time localization and mobile computing technology, it becomes increasingly
popular for sharing individual locations in mobile online social network (mOSN), which
inevitably raises significant concerns on the privacy of users’ locations. Recently,Wei et al. provided
the MobiShare mechanism to enable flexible location sharing between both trusted social relations
and untrusted strangers. Motivated by Wei et al.’s pioneer work, we make a further treatment on
privacy-preserving location sharing in mOSN in this paper. We observe that users’ real fake identities
will be potentially leaked to location service provider in Wei et al.’s work, which may lead to a
variety of serious attacks. In order to fix this security issue, we propose a security improved mechanism
namely MobiShare+, which employs dummy queries and private set intersection protocol to
prevent the OSN service provider and location service provider from learning individual information
from each other. Finally, security analysis is provided to clarify that MobiShare+ is secure in terms
of location privacy and social network privacy.