Secure charging and payment protocol (SCPP) for roaming plug-in electric vehicles

Users of plug-in-electric vehicles (PEV) often need to charge outside their home power grid networks i.e. outside their supplier. This basically constitutes a roaming charging case. Hence, users should be protected from possible security and privacy attacks. Moreover, remote authorization and payment transaction mechanism is required between the different power suppliers. In this paper, we propose a secure charging and payment transaction protocol for roaming PEV charging. Our protocol is developed based on the principles of the Secure Electronic Transaction (SET) protocol. The protocol protects user's privacy not only from external suppliers but also from their own suppliers. Moreover, our protocol is designed in such a way that it is robust against the known security attacks. Our proposed work provides anonymous authorization and payment simultaneously not only between the roaming user and an external supplier but also between suppliers.