Privacy-Preserving Vehicular Announcements Aggregation Scheme Based on Threshold Ring Signature

TL;DR

This paper introduces a novel privacy-preserving scheme for vehicular announcements in VANETs that prevents sybil attacks using threshold ring signatures, ensuring reliability and privacy.

Contribution

It proposes the first scheme to prevent sybil attacks proactively in vehicular networks using interactive threshold ring signatures and message aggregation.

Findings

Scheme effectively defends against sybil attacks.

Demonstrates high efficiency and practicality.

Ensures privacy and reliability in vehicular communications.

Abstract

As the most promising application in VANETs, the vehicular announcement allows vehicles to send announcement messages about road conditions to other vehicles far away. The security requirements of reliability and privacy in the vehicular announcement are not easily achieved simultaneously due to the notorious sybil attack. In this paper, we present a novel privacy-preserving vehicular announcements aggregation scheme. The proposed scheme provides threshold authentication and flexible anonymity using message aggregation and interactive threshold ring signature which allows nondeterministic different signers to generate signature commonly in the environment not fully trusted. Different from existing works in an attack-then-trace mode, our scheme defends against the sybil attack beforehand. To our best knowledge, it is the first privacy-preserving scheme preventing the malicious users from launching the sybil attack in advance. Through extensive evaluation, we show the availability and the efficiency of the proposed scheme.