University of Twente Student Theses


SeDyA: secure dynamic aggregation in VANETs

Heijden, Rens W. van der (2012) SeDyA: secure dynamic aggregation in VANETs.

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Abstract:In Vehicular Ad-hoc Networks (VANETs), the ultimate goal is to let vehicles communicate by exchanging messages through wireless networks to provide safety, traffic efficiency and entertainment applications. Aggregation of information in these messages contributes to this goal by reducing the bandwidth requirements that prevent applications from disseminating messages over a large area. Aggregation will allow applications to exchange high quality summaries of the current status in a specific region, rather than forwarding all individual status messages from this region, increasing the available information for all vehicles. Most existing work on aggregation in VANETs has neglected to consider security, not providing any guarantees on the data that is collected. Security for aggregates is important because they may be used by other cars for decisions about routing, as well as traffic statistics that may be used in political decisions concerning road safety and availability. The most important challenge for security is that aggregation removes redundancy and the option to directly verify signatures on messages, because multiple messages are merged into one. The few works that discuss secure aggregation are limited because they require roads to be segmented into small regions, beyond which aggregation cannot be performed. The main contribution of this thesis is the introduction of SeDyA, a scheme that allows more dynamic aggregation compared to existing work, while also providing stronger security guarantees for the receiving vehicles.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Computer Science MSc (60300)
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