Paper Info
Title
Blockchain-based Lightweight Certificate Authority for Efficient Privacy-preserving Location-Based Service in Vehicular Social Networks
Abstract
Blockchain can be utilized to enhance both security and efficiency for location-based service (LBS) in vehicular social networks (VSNs), due to its inherent decentralization, anonymity, and trust properties. Unfortunately, the existing approaches either lack effective authentication, which is vulnerable to the man-in-the-middle attack, or require an online certificate authority (CA) where frequent interactions with resource-constrained vehicles are required. To address these challenging issues, in this article, a lightweight threshold CA for consortium blockchain along with a privacy-preserving LBS protocol in blockchain enforced VSNs is proposed. First, a lightweight threshold CA framework LTCA is proposed by devising a threshold proxy signature, where the proxy signing key is issued by a coalition of threshold number of CAs playing the roles of authorized nodes in the consortium blockchain. Without the intervene of an online CA, each vehicle in the online phase can authenticate its identity by itself each time its blockchain address (i.e., account address) is updated. Then, based on the proposed LTCA, an efficient privacy-preserving LBS protocol PPVC is contrived to protect each vehicle’s conditional identity privacy with a moderate cost. Finally, both security analysis and performance evaluation demonstrate the effectiveness and efficiency of our proposed LTCA and PPVC in blockchain enforced VSNs.
Year
DOI
Venue
2020
10.1109/JIOT.2020.2974874
IEEE Internet of Things Journal
Keywords
DocType
Volume
Privacy,Protocols,Network architecture,Resists,Social groups
Journal
7
Issue
ISSN
Citations 
7
2327-4662
2
PageRank 
References 
Authors
0.36
0
5
Name
Order
Citations
PageRank
Huajie Shen120.36
Jun Zhou292.87
zhenfu cao3108.69
Xiaolei Dong454.56
Kim-Kwang Raymond Choo54103362.49