An Anonymous Authentication Scheme in VANETs of Smart City Based on Certificateless Group Signature

Abstract

With the change of the network communication environment in vehicular ad hoc networks (VANETs) of a smart city, vehicles may encounter security threats such as eavesdropping, positioning, and tracking, so appropriate anonymity protection is required. Based on the certificateless cryptosystem and group signature ideas, this paper proposes a certificateless group signature anonymous authentication scheme for the VANETs of a smart city. In this scheme, it can implement the process of adding, signing, verifying, and revoking group members only by simple multiplication of the elliptic curve and synchronization factor technology, which shortens the length of the signature and improves the efficiency of the signature. From the proofs of correctness and security, we know that it does not only has anonymity and traceability of the group signature scheme but also has unforgeability and forward security. According to the performance verification, this scheme has lower calculation overhead and higher authentication efficiency.

TFPPASV: A Three-Factor Privacy Preserving Authentication Scheme for VANETs

“…Zhang et al's scheme uses certificateless group signature and the Elliptic curve scalar multiplication operations. Zheng et al [12] proved that overhead cost of their scheme is less than Chen et al 's [13] and Zhao et al's [14] schemes. However, they failed to provide the security analysis of the proposed scheme.…”

“…Security and anonymity provisions are required to avoid these issues. Zheng et al [12] proposed a VANETs authentication scheme for smart cities. Zhang et al's scheme uses certificateless group signature and the Elliptic curve scalar multiplication operations.…”

Retracted: An Anonymous Authentication Scheme in VANETs of Smart City Based on Certificateless Group Signature

“…Tis article has been retracted by Hindawi following an investigation undertaken by the publisher [1]. Tis investigation has uncovered evidence of one or more of the following indicators of systematic manipulation of the publication process:…”