| With the wide application of information system,the problem of data synchronization between data systems becomes increasingly prominent.The realization of data synchronization between different systems in a secure and efficient way has become a widespread concern of enterprises.To enhance the connectivity of data and reduce the problem of information islands,data synchronization is particularly important.Meanwhile,the current research tends to focus on the process of data transmission,but generally neglects the verification mode after data synchronization.Ignorance about whether data has been tampered with,whether sensitive information has been leaked,and data integrity leads to potential flaws in the complete synchronization chain.Aiming at the defects in the existing data system synchronization scheme,we intend to adopt the unique storage mechanism and authentication mode of blockchain to carry out data transmission and synchronization through smart contract,while design a reasonable data verification mode based on elliptic curve encryption and signature algorithm.The Credible Information Synchronization and Verification atop Blockchain(CISVB)is based on Hyperledger Fabric,which is divided into two modules: Credible Data Synchronization Mode(CDSM)and Credible Data Verification Mode(CDVM).CDSM mainly focuses on the data synchronization scheme,in which the data structured design puts forward the data processing mode and data synchronization mode of response and determines the direction of data flow based on the on-chain data synchronization and off-chain database pluggable design.The Gossip protocol is used to ensure the reliability of the data transmission process,while the effective data transmission and query can be completed by smart contract.Meanwhile,CDSM also discusses the synchronization strategy of large volume data and designs the broadcast model based on observer queue.CDVM is mainly aimed at data authentication and security guarantee.Firstly,authentication design is carried out based on PKI authentication architecture and membership MSP model.Next,key threshold sharing is adopted to solve the security problem of key when data is transmitted between different information systems.Then,ECC and AES digital envelope methods are used to ensure data security.Finally,the rationality of CDVM is demonstrated through the digital signature scheme based on ECDSA.In general,the system is a trustless security model,which has a good development prospect in different fields. |
