Data Distribution Scheme for Information Service Based on Blockchain

The main characteristics of data in information service are multi-source, heterogeneous and cross systems, while information service users are scattered throughout the network. There are consequently some urgent problems should be solved in information transmission, distribution security, subject trust, circulation control, etc. Using the advantages of blockchain technology in traceability, tamper proof and distributed storage, and combined with the information service business process, an information service data distribution scheme based on blockchain is proposed. Firstly, the information service data would be encrypted and stored in the Inter Planetary File System (IPFS), and the data addresses are stored in the directory library of information service centers; Secondly, according to the information service subscription/distribution process, a distribution mechanism based on Proxy Re-encryption is designed; then, the information service distribution chain is constructed by using the Consortium Blockchain mode, and the information data and key distribution information are stored on the chain; which is able to better realize distributed data access and centerless access of information services.