PCPA: A Practical Certificateless Conditional Privacy Preserving Authentication Scheme for Vehicular Ad Hoc Networks

Area of Science:

• Computer Science
• Cryptography
• Network Security

Background:

• Vehicle ad hoc networks (VANETs) offer potential for enhanced traffic efficiency and safety through vehicle-to-vehicle and vehicle-to-infrastructure communication.
• Ensuring security and privacy is crucial for the widespread adoption and reliable operation of VANETs.
• Existing security solutions may face challenges related to computational overhead and privacy preservation.

Purpose of the Study:

• To develop a novel certificateless signature with message recovery (CLS-MR) scheme.
• To propose a practical certificateless conditional privacy-preserving authentication (PCPA) scheme for VANETs by integrating the CLS-MR.
• To ensure the proposed scheme meets essential security and privacy requirements for VANETs.

Main Methods:

• Utilized certificateless cryptography and elliptic curve cryptography to construct the CLS-MR scheme.
• Integrated the CLS-MR scheme into a practical PCPA scheme for VANET authentication.
• Conducted security analysis to validate the scheme's adherence to security and privacy standards.
• Performed evaluations and simulations to assess performance metrics like computation, communication costs, message delay, and message loss ratio.

Main Results:

• The proposed CLS-MR scheme is of independent interest.
• The PCPA scheme effectively satisfies all security and privacy requirements for VANETs.
• Achieved low computation and communication costs by avoiding bilinear pairing and map-to-point hash operations.
• Demonstrated feasibility and prominent performance in extensive simulations, with low message delay and message loss ratio.

Conclusions:

• The developed PCPA scheme offers a secure and privacy-preserving authentication solution for VANETs.
• The scheme's efficiency in terms of computational and communication overhead makes it suitable for VANET deployment.
• The prominent simulation results indicate the scheme's suitability for practical adoption in intelligent transportation systems.