Abstract

Protecting the location privacy is still one of the main challenges in Vehicular Ad-hoc Networks(VANETs). Although, standardization bodies such as IEEE and ETSI have adopted the pseudonymous scheme as a solution to this problem, an efficient pseudonym changing and management is still an open issue. In this paper, we propose a complete and efficient pseudonym management and changing scheme based on Vehicular Location Privacy Zone (VLPZ). We define VLPZ as a roadside infrastructure designed to pseudonyms management and changing. This scheme considers that the vehicular geographic area is partitioned as a grid, where each cell contains one or many VLPZs. The location privacy protection level provided by the scheme depends on the VLPZ capacity and the number of vehicles that are inside it at the same time. For this reason, we also propose a reputation mechanism to stimulate vehicles to enter to the VLPZ, and finally evaluate the performances of the proposed scheme using Veins Framework based on OMNet++ network simulator and SUMO mobility. Simulation results demonstrate the effectiveness of the proposed scheme.

Highlights

  • On of the keys of a success deployment of Vehicular AdHoc Networks (VANETs) is to consider the location privacy protection of their users [1]

  • An effective strategy is still an open problem of the literature [12], (ii) due to their rationality behavior, vehicles refuse to cooperate by changing their pseudonyms simultaneously with other vehicles [13], which has a negative impact on the privacy protection level provided by the pseudonym changing approach, and last but not least (iii) the existing solutions to distribute the pseudonyms sets and the certificates revocation lists (CRLs) requires that the VANET area should totally be covered by Roadside Units (RSUs), which generates a high deployment costs and is hard to be achieved, especially in the first phase of the VANETs’ deployment [14]

  • In contrast to the existing solutions that rely only on RSUs that are spread over roads to distribute pseudonyms sets (e.g. [16]) and pseudonyms revocation lists (CRLs) (e.g. [20]), we propose in this paper that the distribution of pseudonyms sets and certificates (pseudonyms) revocation lists (CRLs) is performed inside the Vehicular Location Privacy Zone (VLPZ) and the RSUvzs are the only roadside units that are used for this purpose

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Summary

INTRODUCTION

On of the keys of a success deployment of Vehicular AdHoc Networks (VANETs) is to consider the location privacy protection of their users [1]. An effective strategy is still an open problem of the literature [12], (ii) due to their rationality behavior, vehicles refuse to cooperate by changing their pseudonyms simultaneously with other vehicles [13], which has a negative impact on the privacy protection level provided by the pseudonym changing approach, and last but not least (iii) the existing solutions to distribute the pseudonyms sets and the certificates (pseudonyms) revocation lists (CRLs) requires that the VANET area should totally be covered by Roadside Units (RSUs), which generates a high deployment costs and is hard to be achieved, especially in the first phase of the VANETs’ deployment [14] To address these issues and in contrast to the existing works that only focus on one

RELATED WORK
PSEUDONYM CHANGING AND MANAGEMENT
Adversary Model
System Model and assumptions
VLPZ Model
Pseudonyms Sets and Revocation Lists Distribution
Privacy Level Evolution
Generating The Communication Layers Identifiers
MOTIVATING VEHICLES TO ENTER TO THE VLPZ
PERFORMANCE EVALUATION
Findings
CONCLUSION
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