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A Secure Pseudonym-Based Conditional Privacy-Preservation Authentication Scheme in Vehicular Ad Hoc Networks.

Mahmood A Al-Shareeda1, Mohammed Anbar1, Selvakumar Manickam1

  • 1National Advanced IPv6 Centre (NAv6), Universiti Sains Malaysia, USM, Gelugor 11800, Penang, Malaysia.

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Summary

This study introduces a secure pseudonym-based authentication scheme for vehicular ad hoc networks (VANETs) using Elliptic Curve Cryptography (ECC). It enhances privacy and security while reducing computational overhead compared to existing methods.

Keywords:
Elliptic Curve Cryptography (ECC)Vehicular Ad hoc Networks (VANETs)pseudonym identity schemerandom oracle modelsecurity and privacy requirements

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Area of Science:

  • Computer Science
  • Network Security
  • Cryptography

Background:

  • Existing identity-based schemes in Vehicular Ad hoc Networks (VANETs) often depend on roadside units, posing vulnerabilities to insider attacks and facing challenges with complex cryptographic operations like bilinear pairings for efficient authentication.
  • The need for robust security and privacy in VANET communications is critical due to the sensitive nature of vehicle-to-vehicle and vehicle-to-infrastructure data exchange.

Purpose of the Study:

  • To propose a novel pseudonym-based conditional privacy-preserving authentication scheme for VANETs that addresses the limitations of existing identity-based methods.
  • To enhance communication security by ensuring message integrity, authenticity, unlinkability, and traceability while preserving user identity privacy.

Main Methods:

  • The proposed scheme utilizes Elliptic Curve Cryptography (ECC) and a secure hash cryptographic function for message signing and verification.
  • Vehicles receive pseudo-IDs and signature keys from a Trusted Authority (TA) to sign broadcast messages, and each vehicle verifies received messages.
  • The TA has the capability to revoke misbehaving vehicles, thereby mitigating insider threats.

Main Results:

  • Security analysis confirmed the scheme's ability to meet essential security requirements, including privacy preservation, message integrity, authenticity, unlinkability, and traceability.
  • The scheme demonstrated resilience against common attacks like man-in-the-middle, impersonation, modification, and replay attacks, and was resistant to adaptive chosen-message attacks.
  • Performance analysis indicated significantly lower overhead compared to other identity-based schemes, with substantial reductions in computation costs for message signing (49%), individual signature authentication (33.3%), and batch signature authentication (90.2%).

Conclusions:

  • The proposed ECC-based pseudonym scheme offers a secure and efficient solution for authentication in VANETs, outperforming existing identity-based schemes in terms of computational overhead.
  • The scheme effectively balances security, privacy, and performance, making it a promising approach for securing future vehicular communication systems.