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Secure Public Key Regime (SPKR) in vehicular networks

Abstract : Public Key Regime (PKR) was proposed as an alternative to certificate based PKI in securing Vehicular Networks (VNs). It eliminates the need for vehicles to append their certificate for verification because the Road Side Units (RSUs) serve as Delegated Trusted Authorities (DTAs) to issue up-to-date public keys to vehicles for communications. If a vehicle private/public key needs to be revoked, the root TA performs real time updates and disseminates the changes to these RSUs in the network. Therefore, PKR does not need to maintain a huge Certificate Revocation List (CRL), avoids complex certificate verification process and minimizes the high latency. However, the PKR scheme is vulnerable to Denial of Service (DoS) and collusion attacks. In this paper, we study these attacks and propose a pre-authentication mechanism to secure the PKR scheme. Our new scheme is called the Secure Public Key Regime (SPKR). It is based on the Schnorr signature scheme that requires vehicles to expend some amount of CPU resources before RSUs issue the requested public keys to them. This helps to alleviate the risk of DoS attacks. Furthermore, our scheme is secure against collusion attacks. Through numerical analysis, we show that SPKR has a lower authentication delay compared with the Elliptic Curve Digital Signature (ECDSA) scheme and other ECDSA based counterparts.
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Contributor : Hengchuan Tan <>
Submitted on : Friday, December 22, 2017 - 4:27:10 AM
Last modification on : Friday, October 16, 2020 - 3:40:52 AM
Long-term archiving on: : Friday, March 23, 2018 - 12:00:30 PM

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Tan Chuan, Jun Zhang, Ma Maode, Peter Han Joo Chong, Houda Labiod. Secure Public Key Regime (SPKR) in vehicular networks. International Conference on Cyber Security of Smart cities, Industrial Control System and Communications (SSIC 2015), Aug 2015, shanghai, China. pp.1 - 7, ⟨10.1109/SSIC.2015.7245678⟩. ⟨hal-01480958⟩

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