The impact of security on cooperative awareness in VANET

Abstract

Vehicular networking enables new safety applications that aim at improving roads safety. Because of their direct relation to driver's safety, this goal can only be achieved if vehicular networking is based on a technology that is robust against malicious attackers. Therefore, security mechanisms such as authentication are proposed. However, security comes at a cost in terms of computational and communication overhead. For example, a signature and certificate are appended to every beacon sent, which generates an extra load on the network. Moreover, most of the safety applications require a perfect awareness of the vehicle's surroundings to perform adequately. To represent such awareness, the Awareness Quality is used to indicate the current level of awareness of the vehicle. This metric was previously used by the Decentralized Congestion Control community to improve channel usage. In this paper, we use the Awareness Quality to investigate the impact of security on cooperative awareness in VANET. Then, we apply this metric to the mechanism of certificate omission, and provide extensive simulation results. The attributes of Awareness Quality metrics enable us to investigate the behavior of certificate omission schemes with a precision that was not provided by aggregate metrics. This enables us to show that congestion-based certificate omission with a quadratic adaption function is the most effective scheme among existing certificate omission schemes.

Deployment of vehicular networks in highways using 802.11p and IPv6 technologies

“…Another line is focused on the security aspects in IPv6 vehicular communications, as an addition to current works more focused on certificate-based approaches (Whyte et al, 2013). Our choice is based on the integration of IETF standardised technologies such as IP security (IPsec) or internet key exchange (IKE) in the vehicular domain, considering the network performance overload in this particular scenario (Feiri et al, 2013). A third line in the area is the authentication to access vehicular networks and especially the ones provided by road operators.…”

Adaptive Security for Intelligent Transport System Applications

“…Finally, we show the awareness quality level (AQL) metric (within a safety area of 150m) as proposed by the authors in [13]. The AQL metric provides a measure of how many of the actual neighbors of a vehicle are aware of it at any given time.…”

Pre-Distribution of Certificates for Pseudonymous Broadcast Authentication in VANET

“…The beaconing rate in the simulations is fixed at 10 Hz, as suggested by SAE J2735 [27]. The pseudonym change is simulated between the first 60 and 65 beacon cycles, as this is a time when the Awareness Quality (AQ) [29] is relatively stable.…”