A Practical Security Framework for a VANET-based Entertainment Service

In this paper, we propose a secure multimedia resource trading system in a vehicular ad hoc network, leveraging a short-time self-certificate signature scheme. The short-time self-certificate signature does not need certificate verification overhead. Thus, it can significantly reduce computation and communication delay in the mobile environment. In addition, we present a promising and practical framework for the VANET-based entertainment service by deploying our secure trading system. The main advantage the framework is that it offers fair resource trading and complete transaction between vehicles without the mediation of a dedicated on-line trusted third party. Furthermore, the proposed scheme can prevent selfish vehicles and detect malicious vehicles trying to disguise themselves as resource sellers or repudiating receipt of multimedia resources. Our simulation results and analysis demonstrate validity and practicality of our framework.