Research And Implementation Of Key Technologies For Data Transactions Based On Blockchain

With the rapid development of big data,the data resources followed by explosive growth.Data trading can effectively promote the circulation of data,improve the utilization rate of data,and expand the value of data.The resulting demand for related trading is also increasing,and has promoted the emergence of data trading market.Data,an important asset in digital economy,has fueled the emergence of a new data trading market.At present,in the face of the increasing demand for data trading,the existing data trading models are all based on a centralized model,that is,they are managed by a third-party data trading platform.The security of the trading model depends on the credibility of the third-party data trading platform degree.However,the traditional trading model based on third-party data trading platforms faces many disadvantages.For example,it depend on the trusted third-party to a large extent.But the third-party may be dishonest,and all participants in the data trading process will face huge security and privacy risks.Therefore,the traditional data trading model has the disadvantages of easy data leakage,data quality dispute.In the face of the disadvantages of traditional data trading mode,blockchain technology with smart contract can deal with it.Therefore,the application of blockchain and smart contract technology in data trading scenarios can jointly ensure that the data trading protocol can be safely and fairly executed in an environment without the participation of a trusted third-party,while effectively avoiding the problem of data leakage of traditional trading platforms.Our scheme is based on the underlying platform of the blockchain,and conducts research on key issues such as data quality,data security,and atomicity and fairness of data trading.The specific research contents are as follows: 1)In the face of data quality disputes,we use the characteristics of smart contracts combined with off-chain computing to evaluate data quality;2)In the face of non-atomicity and unfairness in traditional data trading,we design a set of data trading protocols based on smart contract,to ensure the atomicity and fairness of data trading in the absence of trusted third-partiy;3)Facing privacy leakage during data trading,we use SGX as TEE to ensure data evaluation privacy security in the process.Through the research of this subject,the shortcomings of the current blockchain tradingplatform can be solved,and the security issues in the process of data trading can be guaranteed.Finally,we conduct a security analysis on the above scheme and built a private chain for a test experiment.The results prove that this scheme can effectively solve the data dispute and trading fairness in the process of data trading.