Research And Application Of Distributed Data Security Sharing Technology Based On Blockchain

The development achievements of computing,storage and transmission technology have gradually penetrated into the social industry and our lives,and data sharing is extremely important for giving full play to the value of data itself.However,under the traditional data sharing model,the use of electronic data is not easy to monitor and other phenomena frequently occur.Data providers are unwilling to share their data,and the problem of "data islands" is prone to appear.Aiming at the problems of traditional centralized data sharing and management in terms of security,control,etc.,this paper studies and realizes the blockchain-based distributed data security sharing technology and its application.The main research work and results of the paper are as follows:First,it proposes a distributed data security sharing model and scheme based on blockchain.The distributed data security sharing model based on blockchain is studied,including security trust model and layered technical architecture.On the basis of this model,the core key technology of distributed data security sharing based on blockchain is researched and designed.Second,design the key technology and key algorithm of distributed data security sharing based on blockchain.Proposed a distributed data security access model based on blockchain,combined with IPFS storage technology and data encryption technology to achieve data security access,proposed a blockchain-based fine-grained dynamic access control algorithm model,combined with DCPABE algorithm to solve the data The security issue of storage key transmission to support dynamic determination of environmental attributes.Third,design and implement a distributed data security sharing system based on blockchain.Based on the Hyperledger Fabric blockchain underlying platform and IPFS decentralized storage technology research,the key technology of distributed data security sharing has been realized.Finally,the feasibility,security and controllability of the implemented system are evaluated,and the function and performance of the system are tested.The evaluation shows that the blockchain-based distributed data security sharing technology proposed in this article has good performance.Feasibility,safety,controllability and efficiency.