[Paper Review] A Self-Authentication and Deniable Efficient Group Key Agreement Protocol for VANET

Mu Han, Lei Hua+1 more|arXiv (Cornell University)|Nov 28, 2016

Vehicular Ad Hoc Networks (VANETs)6 references4 citations

TL;DR

This paper proposes a self-authenticating, deniable, and efficient group key agreement protocol for Vehicular Ad Hoc Networks (VANETs) that eliminates reliance on certification authorities. By leveraging self-authentication and a deniable key negotiation mechanism, the protocol enhances security and reduces verification delay, transmission overhead, and message delay compared to existing schemes, achieving improved efficiency in group communication among vehicles and RSUs.

ABSTRACT

With the rapid development of vehicular ad hoc Network (VANET), it is gaining significant popularity and receiving increasing attentions from academics and industry in security and efficiency. To address security and efficiency issues, a self-authentication and deniable efficient group key agreement protocol is proposed in this paper. This scheme establishes a group between road-side unit (RSU) and vehicles by using self-authentication without certification authority, and enhances certification efficiency by using group key (GK) transmission method. At the same time, to avoid the attacker to attack the legal vehicle by RSU, we adopt deniable group key agreement method to negotiation session key (sk) and use it to transmit GK between RSU. In addition, vehicles not only broadcast messages to other vehicles, but also communicate with other members in the same group. So group communication is necessary in VANET. Finally, the security and performance analysis shown that our scheme is security, meanwhile the verification delay, transmission overheard and message delay are more efficient than other related schemes in authentication, transmission and communication.

Motivation & Objective

• To address security and efficiency challenges in group key management for VANETs.
• To eliminate dependency on certification authorities by introducing self-authentication in group key agreement.
• To reduce verification delay, transmission overhead, and message delay in vehicular group communication.
• To prevent impersonation attacks by RSUs on legitimate vehicles through deniable key negotiation.
• To enable secure, efficient, and scalable group communication between vehicles and RSUs in dynamic VANET environments.

Proposed method

• The protocol uses self-authentication to allow vehicles and RSUs to authenticate each other without relying on a certification authority.
• It introduces a group key (GK) transmission method that enhances certification efficiency and reduces overhead.
• A deniable group key agreement mechanism is employed to negotiate session keys (SKs), preventing impersonation attacks from RSUs.
• The scheme supports bidirectional communication: vehicles broadcast to peers and communicate directly within the group.
• The protocol integrates cryptographic techniques to ensure forward secrecy and resistance to replay and man-in-the-middle attacks.
• Security and performance are evaluated through formal analysis and comparative benchmarks against existing schemes.

Experimental results

Research questions

• RQ1 How can group key agreement in VANETs be made secure without relying on centralized certification authorities?
• RQ2 What mechanisms can reduce verification delay, transmission overhead, and message delay in vehicular group communication?
• RQ3 How can RSUs be prevented from impersonating legitimate vehicles in group key negotiation?
• RQ4 What is the impact of self-authentication and deniable key exchange on overall protocol efficiency?
• RQ5 How does the proposed scheme compare to existing group key agreement protocols in terms of security and performance?

Key findings

• The proposed protocol achieves lower verification delay compared to existing schemes, improving real-time performance in dynamic VANET environments.
• Transmission overhead is reduced due to the efficient group key transmission mechanism and elimination of certificate exchanges.
• Message delay is minimized through optimized cryptographic operations and lightweight authentication techniques.
• The scheme demonstrates strong resistance to impersonation attacks, especially from malicious RSUs, due to the deniable key negotiation process.
• Security analysis confirms the protocol's resilience against common threats such as replay, man-in-the-middle, and key compromise attacks.
• Performance evaluation shows the protocol outperforms related works in authentication, transmission, and communication efficiency metrics.