Performance and Scalability Assessment for Non-Certificate-Based Public Key Management in VANETs

Performance and Scalability Assessment for Non-Certificate-Based Public Key Management in VANETs

Pei-Yuan Shen, Maolin Tang, Vicky Liu, William Caelli
Copyright: © 2012 |Pages: 24
DOI: 10.4018/jisp.2012010103
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Current research in secure messaging for Vehicular Ad hoc Networks (VANETs) focuses on employing a digital certificate-based Public Key Cryptosystem (PKC) to support security. However, the security overhead of such a scheme creates a transmission delay and introduces a time-consuming verification process to VANET communications. This paper proposes a non-certificate-based public key management for VANETs. A comprehensive evaluation of performance and scalability of the proposed public key management regime is presented, which is compared with a certificate-based PKC by employing a number of quantified analyses and simulations. In this paper, the authors demonstrate that the proposal can maintain security and assert that it can improve overall performance and scalability at a lower cost, compared with certificate-based PKC. The proposed scheme adds a new dimension to key management and verification services for VANETs.
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Certificate-Based PKC Scheme in VANETs

Numerous studies and standards cite the use of a certificate-based PKC to support security for VANETs (Di Crescenzo et al., 2007; Freudiger et al., 2007, 2008; Institute of Electrical and Electronics Engineers, 2006; Iyer et al., 2008; Kounga et al., 2009; Papadimitratos et al., 2007; Plößl & Federrath, 2008; Plößl et al., 2006; Rao et al., 2007; Raya & Hubaux, 2005a, 2005b, 2007; Raya et al., 2006; Sunnadkal et al., 2010; Wang et al., 2008; Xiaonan et al., 2007). For example, Raya and Hubaux (2005a) appear to be the first research team to propose a vehicular Public Key Infrastructure (PKI), based on a certificate-based PKC scheme to support security services for message exchange in the vehicular communication environment. IEEE 1609.2-2006 Standard for Wireless Access in Vehicular Environments (WAVE) (2006) mandates the use of certificate-based PKC mechanisms to support authentication and encryption services for VANETs. Papadimitratos et al. (2007) discuss a security architecture based on the certificate-based PKC mechanism for VANETs. However, only a few authors have acknowledged the shortcomings of using the certificate-based PKC scheme in VANETs (Plößl & Federrath, 2008; Raya & Hubaux, 2007). Secure messaging based on the certificate-based PKC scheme has a number of limitations, including complexity in certificate verification and management, scalability, performance in a large-scale environment, and timely access to certificate revocation information. These issues with the certificate-based PKC scheme remain when applied to VANETs.

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