Secure Battery Swapping: A Reservation Scheme with Conditional Privacy-Preserving Bidirectional Heterogeneous Aggregate Signcryption and Incentive Mechanism

Abstract

For large-scale battery-swapping demands, reserva- tions are utilized to effectively manage battery swapping. To achieve data security, one promising solution is heterogeneous signcryption (i.e. signature + encryption). However, existing heterogeneous signcryption cannot simultaneously support aggre- gation, batch verification, conditional privacy-preserving, bidirec- tional heterogeneous communication, and availability. Besides, to reduce the end-to-end delays, mobile edge computing (MEC) is introduced to reservations, so other challenge is to design an incentive mechanism to encourage mobile edge nodes (MENs) to transmit reservation messages. Seeking to address these chal- lenges, we propose a reservation scheme with conditional privacy- preserving bidirectional heterogeneous aggregate signcryption and incentive mechanism, namely SecBS. More precisely, in status publication (i.e. SecBS-SP), electric vehicles (EVs) obtain status messages released by battery swapping stations (BSSs) via MENs, which is realized via heterogeneous signcryption from certificateless cryptosystem (CLC) to identity-based cryptosystem (IBC). In the reservation (i.e. SecBS-R), under the incentive, MENs transmit reservations sent by EVs to BSSs, which is realized via heterogeneous signcryption from IBC to CLC. Finally, formally security proof and extensive simulations are carried out to manifest the security and feasibility of our SecBS.