A V2V electricity transaction scheme with privacy protection based on the Internet of vehicles and consortium blockchain

With the development of Electric Vehicles (EVs), Vehicle-to-Vehicle (V2V) electricity transactions have gained popularity. Among them, EV users can easily obtain information such as their own location and speed through the Internet of Vehicles (IoV), and communicate with other entities through the IoV, but the leak of the electricity transaction plan and private information such as identity, location, speed, etc. required for the transaction may put the users in danger and undermine the fairness of the transaction. Aiming at the above problems, A V2V electricity transaction scheme with privacy protection based on the IoV and consortium blockchain is proposed. Firstly, a long-term and short-term pseudo-identity algorithm is designed for users participating in V2V transactions. Users conduct each electricity transaction with different short-term pseudo-identities to prevent the leakage of their identity information; and when fraudulent transactions occur, the real identity of the fraudulent users can be traced based on their long-term pseudo-identities or public key information. Secondly, a certificateless aggregate signcryption algorithm is designed for secure communication in the IoV. Finally, consortium blockchain technology is adopted to solve the problems of single point of failure and data tampering that exist in centralized transactions. At the same time, a reputation value evaluation mechanism based on transaction completion rate and a Proof of Reputation consensus mechanism based on fixed time and fixed block capacity packing method are also designed, which not only reduces the computational power consumption but also motivates the seller EV to conduct V2V electricity transactions in good faith. The theory proves that the scheme is capable of protecting the privacy of EV users effectively. The performance evaluations demonstrate that this scheme has low communication overhead and the computational overhead also has certain advantages.