Research On Electronic Evidence Storage Technology Based On Blockchain

Under the goal of "carbon peak and carbon neutrality",vehicle-to-grid(V2G)technology is becoming a key player in the green-oriented transition of energy.With the continuous popularization of V2 G technology and the wide participation of electric vehicle users,various types of transaction disputes and controversies are increasingly emerging in the V2 G network energy trading market.The participation of electronic data as electronic evidence in court hearings has increasingly become a crucial form of judicial practice in China,and for the energy trading market in V2 G networks,transaction records have undoubtedly become the key electronic evidence.However,the V2 G network energy trading market is facing problems such as the lack of trust between entities,the security and privacy challenges of energy transactions,the complex forensic environment of transaction records,and the doubtful authenticity,which cannot guarantee the true legitimacy of transaction record deposits.In view of the above problems,this paper focuses on the electronic evidence storage of transaction records in V2 G networks energy trading market,starting from two aspects of building a legal forensic environment and secure storage of authentic sources,and combined with blockchain technology to research its key technologies.The main research work of the paper is as follows:(1)Aiming at the energy transactions between distrustless entities in the V2 G network and the multi-domain architecture of the V2 G network,in order to realize the safe opening of V2 G energy transactions for electric vehicles and build a legal forensic environment,this paper proposes a blockchain security authentication scheme for V2 G forensics from the perspectives of single domain and multi-domain,respectively.Firstly,the scheme designs a two-layer blockchain authentication model for intra-domain authentication and cross-domain Authentication;secondly,mutual authentication between electric vehicles and charging stations is achieved through a certificateless encryption system,a pseudonym mechanism and a key negotiation mechanism;meanwhile,an editable blockchain is combined to support the revocation mechanism of malicious electric vehicles' identity.Finally,the superiority of the scheme is verified through safety analysis and experimental evaluation,and the legal forensic environment for electric vehicles is guaranteed through security identity authentication.(2)On the basis of the electric vehicle's safe access to the V2 G network through identity authentication for energy transactions,in order to realize the secure storage and solidification of real transaction records in a legal way and trustworthy sharing,this paper proposes a blockchain-based V2 G secure transaction storage scheme.First of all,the source of transaction records is guaranteed to be legal,publicly accountable and authentic through the construction of a signature chain,and the public trust and legal traceability of transaction records are realized through hybrid blockchain.Secondly,the fine-grained access control to the transaction records is established through the ciphertext strategy based on the attribute encryption algorithm,and the simulation system verification is built on the FISCO BCOS blockchain platform.Finally,through the results of protocol analysis and experimental evaluation,it is explained that the proposed scheme is less costly and has more functional and safety features.