Abstract
Internet of Vehicles (IoV) has the potential to enhance road-safety with environment sensing features provided by embedded devices and sensors. This benignant feature also raises privacy issues as vehicles announce their fine-grained whereabouts mainly for safety requirements, adversaries can leverage this to track and identify users. Various privacy-preserving schemes have been designed and evaluated, for example, mix-zone, encryption, group forming, and silent-period-based techniques. However, they all suffer inherent limitations. In this paper, we review these limitations and propose WHISPER, a safety-aware location privacy-preserving scheme that adjusts the transmission range of vehicles in order to prevent continuous location monitoring. We detail the set of protocols used by WHISPER, then we compare it against other privacy-preserving schemes. The results show that WHISPER outperformed the other schemes by providing better location privacy levels while still fulfilling road-safety requirements.
Highlights
A Vehicular Ad-hoc Network (VANET) with its variety of protocols (e.g., IEEE 802.11P, IEEE 1609) [1] and communication types like Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) [2] has served as a basis for the promising Internet of Vehicles (IoV)paradigm [3,4,5]
We propose a novel location privacy-preserving scheme, entitled WHISPER, that maintains privacy without sacrificing safety; We detail the techniques and protocols used by WHISPER for adjusting the transmission range and performing a pseudonym change; We compare WHISPER to well-known location privacy-preserving schemes such as cooperative pseudonym change (CPN) [14], Random Silent Period (RSP) [15], and SLOW [16] in a manhattan-grid model with various densities using location privacy and Quality of Service (QoS) as metrics in addition to a comparative table
WHISPER, a novel location privacy-preserving scheme that is based on reducing the transmission range while sending the safety beacons was proposed
Summary
A Vehicular Ad-hoc Network (VANET) with its variety of protocols (e.g., IEEE 802.11P, IEEE 1609) [1] and communication types like Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) [2] has served as a basis for the promising Internet of Vehicles (IoV). Since BSMs contain fine-grained location data, even though they are useful for road safety, they do open privacy-related issues: Any entity with eavesdropping capability can monitor the whereabouts of IoV users. Location privacy leaks can reveal the home and work address of the driver, some visits to sensitive places, travel habits, times of absence from home, etc The correlation of this spatio-temporal information with other data allows an adversary to come to conclusions about health habits, social contacts, religious beliefs, etc. We propose a mechanism that reduces the transmission range occasionally to just inform nearby vehicles and prevent the adversary from tracking users through BSMs. The design of a pseudonym change scheme.
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