Research On Decentralized And Trusted Data Sharing Technology Based On Blockchain

In the current information age,more data means more information.However,the full sharing of data will increase the possibility that criminals will use the relevant data to commit crimes.With the development of cloud computing technology,data sharing can be implemented on the cloud,which means that the shared data should be stored in the data center.However,this will not guarantee the security and privacy of the shared data,and there are security risks such as tampering and counterfeiting of shared data.The decentralization of the blockchain and the non-tamperable nature of the data on the block can safely save data sharing records without the need for trusted third-party institutions.The thesis will study the decentralized trusted data sharing technology based on blockchain to enhance the credibility of data sharing.This thesis will use the characteristics of blockchain's decentralized trust management to explore the decentralized solutions for trusted data sharing.Aiming at the storage problem of shared data,a block structure of shared data for the blockchain is proposed,a shared data storage block structure based on the blockchain is designed,and information of the shared data is stored in the body of the blockchain;In response to data access requests and services in data sharing,a blockchain-based,decentralized data sharing mechanism is proposed;Using the characteristics of smart contracts that can be transferred and stored through data variables as parameters,a decentralized and trusted data sharing smart contract is designed to form a blockchain-based data sharing prototype system.Finally,the real-world scenario is simulated on the Ethereum open source platform.A blockchain-based data sharing system is simulated and run on the Ethereum blockchain platform,and a data sharing function test is performed.The experiments show that the data sharing technology scheme based on blockchain in the decentralized application environment and the premise of data distributed storage to protect data security,to a certain extent,enhance the credibility of data sharing.