A lightweight privacy preserving scheme of charging and discharging for electric vehicles based on consortium blockchain in charging service company

【Author】 Zhang, Shaomin; Ma, Mingzuo; Wang, Baoyi

【Source】INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS

【影响因子】5.659

【Abstract】Charging service companies (CSC) provide charging and discharging services for electric vehicles (EV) by managing numerous charging piles (CP). At that time, the privacy preservation of EV users has become a problem that must be solved. The lightweight solution has a broad applicated prospect because of its excellent efficiency and security. Simultaneously, the centralized storage of massive EVs' real-time power information (RPI) may cause some risks, such as data tampering and single point of failure. Therefore, a lightweight privacy preserving scheme for EVs based on consortium blockchain (CB) in CSC is proposed to solve the problems mentioned above. The scheme has the following novelties and contributions: (1) a pseudo identity algorithm is designed to realize EV users to charge, discharge, and enjoy other services with pseudo identity, which can protect EV users' privacy and security; (2) a certificateless aggregation signcryption algorithm is designed to realize lightweight RPI secure communication: in this algorithm, the function of information signature and encryption in one operation is realized, and the operation steps are simplified; bilinear pairing and exponential operation are not used to improve the efficiency of aggregate signcryption; batch aggregation and verification are designed to ensure the EV's RPI can be stored in the CB securely and efficiently; (3) the CB technology is adopted to solve the problems of data tampering and single point of failure of the central organization. Moreover, the consensus mechanism in the CB is designed in this scheme to further improve the scheme's efficiency. Finally, theoretical analysis proves that the scheme can guarantee users' privacy. Experiments show that for 800 EV users, the time overhead of our scheme is only 1969.5 s, which is lower than other existing schemes.

【Keywords】Electric vehicles; Lightweight; Privacy preserving; Certificateless aggregate signcryption; Consortium blockchain

【发表时间】2022 DEC

【收录时间】2022-11-04

【文献类型】理论模型

【主题类别】

区块链应用-实体经济-交通领域