Research And Implementation Of Decentralized Electronic Depository System Based On Blockchain And IPFS

Electronic storage refers to recording the events in the network or the real world in the form of data by means of information technology to prove the time and content of the events.The content of storage can include web screenshots,computer documents,video files,images and so on.The application field of electronic deposition technology is very broad,with many application scenarios,such as: electronic contract,online transaction,financial transaction,evidence preservation,intellectual property and so on.Electronic data is digital and easy to attack,easy to be tampered with or destroyed,and it is difficult to guarantee the authenticity and integrity of the storage information.At the same time,irregular operation often occurs in the storage process,which is easy to weaken the legal effect of the storage.The data storage structure of blockchain has the characteristics of decentralization,openness,non-repudiation,non-tampering,security and transparency,etc.It can effectively ensure the integrity and authenticity of data,and its technical characteristics meet the needs of electronic storage scenarios.Based on blockchain and IPFS technology,this dissertation proposes a decentralized electronic storage scheme based on blockchain and IPFS technology,and designs and implements a decentralized electronic storage system on this basis.This dissertation first summarizes the electronic deposit certificate and block chain technology research background and research status at home and abroad,the research analysis of 6 kinds of mainstream public chain,chain based on technology and distributed storage technology,based on Hyperledger Fabric1.0 and IPFS devised a decentralized storage card scheme,through the summary,asymmetric encryption,digital timestamp,Merkle Tree algorithm and intelligent technology such as contract,to witness the acquisition of electronic data,signature,calibration,to form an electronic exists,provide the authenticity and integrity of electronic documents to prove that,By means of IPFS technology,storage files are decentralized and stored to IPFS network nodes.After that,the requirements of electronic storage system are analyzed and discussed,and the architecture,storage platform and system module functions of decentralized electronic storage system based on blockchain and IPFS are designed.The Hyperledger Fabric 1.0 blockchain network and IPFS nodes are built by cloud server,and the decentralized electronic storage platform and system modules are realized.After running tests,the blockchain and IPFS network set up in this dissertation run well,supporting the upper application to achieve the storage and storage functions of pictures,video,documents and other data,which can ensure that the electronic storage information is not tampered with,anti-repudiation,and ensure the authenticity and integrity of electronic storage files,in line with the requirements of the system.At the same time,the blockchain cluster is efficient,flexible,able to dynamically add and delete nodes,has scalability and can resist block chain attacks such as double flower attack.This dissertation studies the application of blockchain and IPFS technology in the field of storage and provides support for the application of blockchain technology and IPFS distributed storage technology in financial transactions and other fields.