reputation-CCNC2011 - The 8th Annual IEEE Consumer...

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Abstract A vehicular network must ensure a trust relationship among participating “smart vehicles” (vehicles installed with wireless network devices) and roadside infrastructure in order to maximize the benefit provided by the network. In this paper, we present practical ways to provide reliable reputation scores for vehicles in a vehicular network. Because in most of the time, the majority of people drive their vehicles locally for their daily commute (to work places, schools, daycares, superstores, etc), most vehicles have their predefined constant daily trajectories. Based on this phenomenon, roadside infrastructure could rely on repeated daily observations of the same set of passing-by vehicles to build long-term reputation scores for these local “community” vehicles, in the similar way as the reputation built-up for people in a club or a church community. The proposed scheme does not require sufficient density of smart vehicles and only requires each smart vehicle has one secret and verifiable certificate. These features make it especially suitable for the initial deployment stage of vehicular network when the penetration rate of smart vehicles is very low and vehicle-based public-key infrastructure is not mature. Keywords vehicular networking security, reputation system, initial deployment stage, roadside unit I. INTRODUCTION Vehicular Ad hoc Network (VANET) is a form of mobile ad-hoc network to provide communications among nearby vehicles and between vehicles and nearby roadside equipments [1]. Applications of VANET include emergency/safety warning, driving directions, cooperative driving, information exchange between nodes/vehicles, access to Internet, location aware advertising, on demand content, file sharing, etc [2][3]. For the success of all these applications, it is critical to ensure that VANET can provide reliable and secure data transmission, and full cooperation from all or most vehicles. Most previously proposed VANET architectures and applications (including security architectures) have an implicit assumption that there are sufficient number of vehicles equipped with wireless devices (called “smart vehicles”) on roads when a proposed architecture is deployed. Under this assumption, in most of the time VANET can rely on Vehicle-to-Vehicle (V2V) communication and multi-hop communication to achieve its functions and service. This assumption, however, is not a realistic assumption during the long initial years of VANET deployment. Due to the huge population of existing non-smart vehicles and the long lifetime of vehicles, it will take years or even decades transition period before we could have a mature VANET environment where most vehicles are smart vehciles. Thus instead of focusing on mature VANET scenarios, it is more important to develop economical and feasible architectures that are suitable for VANET initial deployment stage.
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reputation-CCNC2011 - The 8th Annual IEEE Consumer...

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