An Efficient and Physically Secure Privacy-Preserving Authentication Scheme for Vehicular Ad-hoc NETworks (VANETs)

Abstract

Vehicular ad-hoc networks (VANETs) can substantially improve traffic safety and efficiency by providing a communication platform between vehicles and roadside units (RSUs) to share real-time information on traffic and road conditions. Two essential security requirements for VANETS are data authentication and the preservation of the privacy of vehicle owners. Conditional privacy-preserving authentication (CPPA) schemes address both of these security requirements. The existing CPPA schemes either require a tamperresistant device (TRD), which is vulnerable to key exposure based on physical attacks, or require continuous communications of vehicles with RSUs, which significantly increases the communication overhead. This paper addresses both of these problems by proposing a provable secure, and efficient CPPA scheme. We prove the privacy-preserving property of our scheme in the random oracle model and show that it offers anonymity, unlinkability, and tamper detection even if a physical attacker succeeds in compromising an individual OBU. Moreover, the performance analysis of our scheme shows a substantial improvement in communication cost, especially in comparison with RSU-aided schemes that require continuous vehicle communication with roadside units and a Trusted Authority (TA).

Trusted Access Authentication Technology for Large-Scale Heterogeneous Terminals in a Vehicle Charging Network System

“…To ensure system security, trusted access schemes that allow legitimate terminals and deny illegal terminals are necessary. The common trusted access technologies are usually implemented based on cryptography [6,7,11,12]. Taking the PKI-based authentication scheme as an example, through the certification authority which verifies whether the current terminal is legal, the scheme can ensure that only trusted terminals have access [6,7].…”

“…Many of them are limited in terms of computer and storage resources. This may prevent them from performing common authentication algorithms [6,7,11,12] that require encryption and decryption calculations. To address the problem of heterogeneous terminals access authentication, in the proposed end-edge-cloud cooperative authentication framework, the center cloud node and all the edge cloud nodes are configured with our novel unified trusted access authentication (UTAA) model.…”