Probabilistic key distribution in vehicular networks with infrastructure support

We propose a probabilistic key distribution protocol for vehicular network that alleviates the burden of traditional public-key infrastructures. Roadside units act as trusted nodes and are used for secret-sharing among vehicles in their vicinity. Secure communication is immediately possible between these vehicles with high probability. Our performance evaluation, which uses both analysis and simulation, shows that high reliability and short dissemination time can be achieved with low complexity.