NDLI: A Physical-Layer Location Privacy-Preserving Scheme for Mobile Public Hotspots in NEMO-Based VANETs

Content Provider	IEEE Xplore Digital Library
Author	Taha, S. Xuemin Shen
Copyright Year	2000
Abstract	A network mobility (NEMO)-based vehicular ad hoc network (VANET) is a new approach to integrate the NEMO protocol with VANETs. This integration supports communications between roadside units (RSUs) and vehicles and provides Internet access through public hotspots located inside public transportation systems, such as buses, trains, and shuttles. Passengers inside these public transportation systems enjoy full Internet access by using different mobile network nodes (MNNs), such as cell phones and personal digital assistants. However, due to the open nature of wireless network environments, physical-layer attackers can easily localize the MNNs by measuring their received signal strength (RSS) through positioning schemes such as the triangulation scheme. In this paper, we modify obfuscation, i.e., concealment, and power variability ideas and propose a new physical-layer location privacy scheme, i.e., the fake point-cluster-based scheme, to prevent attackers from localizing users inside NEMO-based VANET hotspots. The proposed scheme involves fake-point- and cluster-based subschemes, and its goal is to confuse the attackers by increasing the estimation errors of their RSSs measurements and, hence, preserving MNNs' location privacy. Using correctness, accuracy, and certainty metrics, we show that the fake point-cluster-based scheme achieves higher MNN's location privacy when the number of network grid points in the hotspot decreases. In addition, our extensive simulations show that the fake point-cluster-based scheme achieves 23% and 37% decreases in the average sender's power and the MNN-AP route path length, respectively, compared with the fake-point subscheme.
Sponsorship	IEEE Intelligent Transportation Systems Society
Starting Page	1665
Ending Page	1680
Page Count	16
File Size	2458480
File Format	PDF
ISSN	15249050
Volume Number	14
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vehicular ad hoc networks Mobile communication Physical layer Privacy Estimation error wireless position estimation attacks Network mobility (NEMO)-based VANET NEMO security physical-layer location privacy physical-layer security
Content Type	Text
Resource Type	Article
Subject	Automotive Engineering Mechanical Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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