Group-Signature and Group Session Key Combined Safety Message Authentication Protocol for VANETs

Abstract

Anonymous authentication has significant contribution to privacy protection in safety message dissemination for Vehicular Ad Hoc Networks (VANETs); however, it suffers from heavy workload of vehicle revocation check and message signature verification, which leads to unsatisfactory timeliness and high message loss rate in heavy traffic situations. To manage these challenging problems, this paper proposes an efficient safety message authentication protocol for VANETs by combining batch group signature verification and our proposed Group Session Key (GSK). Specifically, our signature verification method for safety message can both achieve computation efficiency by reducing the number of computation operations of bilinear pairing and resist impersonation attack by using tracking key implement. GSK is associated with the forward and backward keys and is only shared among unrevoked vehicle within a group. Performance analysis and simulations demonstrate that our protocol can provide promising security against various common types of attackers and is more efficient than traditional group-signature-based authentication protocols, in terms of computation time cost, authentication delay and message loss rate.

A Survey on the Current Security Landscape of Intelligent Transportation Systems

“…However, this scheme is limited in scope since it only supports vehicle-toinfrastructure communications. Zhang et al [139] introduce a novel scheme that adopts (a) batch group signature verification to minimize the computational cost of signatures verification; and (b) Group Session Key (GSK)-based revocation strategy to quickly check whether the message sender has been revoked or not. The scheme is effective against several attacks (e.g., impersonation attacks, tracking attacks, Sybil attacks, replay attacks, and DoS attacks) with an acceptable level of performance in terms of computation, authentication delay, and message loss rate.…”

Efficient Short Group Signatures for Conditional Privacy in Vehicular Ad Hoc Networks via ID Caching and Timed Revocation

“…Zhang et al proposed a different scheme using pairings for privacy preserving signatures [18]. In this scheme, RSUs can trace the identity of malicious nodes, however the trace requires up to pairing operations, where is the number of vehicles in the group.…”

“…At the same time, vehicles in the group cannot determine the pseudo-IDs of any other vehicles in the group from their signatures. The performance of the proposed scheme was compared to existing schemes [18] and [21] as these schemes are the only schemes reviewed that also provide tracing and authentication of vehicle's real identities. The estimated times required for message signing and verification for the three schemes are presented in Fig.…”

AAAS: An Anonymous Authentication Scheme Based on Group Signature in VANETs

“…In this section, AAAS is compared with CPAS [12], EDKM [16], LIAP [13], and GSSA [18] in anonymous authentication. We give the details from 3 aspects: communication overhead, computation cost, and signaling cost.…”

“…However, the scheme does not mention how to disclose each illegal vehicle identity and trajectory, which is unable to solve the credential revocation of illegal vehicles. Reference [18] adopts a batch group signature scheme to achieve effcient message signature verifcation and propose group session key (GSK)-based revocation strategy (GSSA) to achieve fast vehicle revocation check. In terms of computation time cost, message delay and loss rate, GSSA is efficient.…”