Research On Modeling And Application Of Big Data Trading Smart Contract Based On Blockchain

With big data becoming the engine to promote scientific innovation,business model change and economic development,data resources have become the key production factors and strategic resources in human social life.This makes big data trading more and more important in data circulation and sharing.The rapid development of big data trading brings us great convenience to obtain data,but also brings a series of problems,mainly in the following three aspects: data retention,data auction and data resale.To fundamentally solve the problems such as data retention brought by the development of big data trading,it is necessary to conduct systematic and scientific research on big data trading to reveal its laws and characteristics,so as to provide a theoretical basis for the management of big data trading.The centralized trading platform is the key factor leading to data retention and other problems,while blockchain and smart contract have the nature of decentralization,which can avoid the centralization of trading platform.Therefore,this paper uses the blockchain and smart contract to solve the problems of data retention,data auction and data resale.The main research contents are as follows:(1)Research on smart contract model of anti-data retention big data tradingThe smart contract model of anti-data retention big data trading is created.The data trading principle in the decentralized big data trading environment is proposed.Namely,based on the decentralized blockchain platform,the distributed database is used to realize the anti-data retention,and the smart contract is used to realize the big data trading.The model takes smart contract as the core and combines with Inter Planetary File System to realize anti-data retention in the process of big data trading.Based on the model,the challenge-response mechanism and the off-chain download data resource mechanism are designed,and the algorithms for requesting to purchase data resources,payment and settlement of successful trading,data download dispute,and data availability dispute are proposed.The effectiveness of the model and algorithm is demonstrated by simulation.(2)Research on smart contract model of anti-collusion big data auctionThe smart contract model of anti-collusion big data auction is created.The anti-collusion principle in the decentralized big data auction trading environment is proposed.Namely,based on the decentralized blockchain platform,sealed bid is used to achieve the information isolation of non-collusive data buyers,and the big data auction algorithm is used to prevent the conspirators achieving the collusion purpose,and the anti-collusion is realized.The model is based on smart contract and combines with auction theory to realize anti-collusion in the big data auction process.Based on the model,the anti-collusion big data auction mechanism is designed,and the big data auction algorithm is proposed.The correctness of the model and algorithm is proved by simulation.(3)Research on smart contract model of anti-data resale big data tradingThe smart contract model of anti-data resale big data trading is created.The anti-data resale principle in the decentralized big data access-to-market trading environment is proposed.Namely,based on the decentralized blockchain platform,the legality-determination of the newly entered disputed data-for-sale is initiated,and the data-on-sale and the disputed data-for-sale are used to conduct similarity analysis,and the legality of the data-for-sale is determined based on this,and the anti-data resale is realized.The model takes smart contract as the core and combines with large margin multi-task metric learning to realize the anti-data resale in the review process of big data access-to-market trading.Based on the model,the decentralized data-for-sale mechanism and the dispute resolution mechanism are designed,and the data-for-sale,access-to-market and dispute resolution algorithm are proposed.The effectiveness of the model and algorithm is demonstrated by simulation.(4)Research on the application of big data trading smart contract modelThe reality of big data trading centralization and the inevitable development trend of big data trading decentralization are considered,and the advantages of centralized big data trading and the advantages of decentralized big data trading are combined.Big data trading based on consortium blockchain is taken as an application scenario,and the feasibility and practicability of the big data trading smart contract model created is verified in this paper.The corresponding big data trading rules are established,that is,a new trading method based on big data trading smart contract model is formed.This paper is an attempt to research the above fields,exploring and innovating the research contents and methods of smart contract model of anti-data retention big data trading,anti-collusion big data auction and anti-data resale big data trading.