Research On Secure And Trusted Transaction Scheme Of Data Resources Based On Blockchain

At present,data is an important strategic resource in the information age.With the widespread application of blockchain technology in data transaction sharing,the problem of easy leakage of private data transaction information has become increasingly prominent.How to ensure the transaction privacy protection of sensitive data in the blockchain environment has been a research hotspot in recent years.In the current trading environment,many scholars currently pay too much attention to enhancing the privacy of data transactions and ignore the supervision and traceability in the process of transaction,which leads to serious data abuse.In the absence of supervision,data transactions also have a certain degree of unfairness.Therefore,by analyzing the specific data transaction process in the blockchain environment,this thesis studies data supervision and transaction fairness in the privacy environment with the help of group signature algorithms,zero-knowledge proofs,and oblivious transfer protocol,and designs corresponding solutions.The main research contributions and innovations are as follows:(1)Aiming at the difficulty of supervision and traceability based on privacy protection,an anonymous and traceable data transaction mechanism is proposed.In the transaction process based on blockchain,the user identity can be anonymous and traceable at the same time.For the problem of user identity privacy leakage in data transactions,the user signs the transaction by using the group signature algorithm,which can realize the anonymity of the user's identity when signing the transaction.When necessary,the transaction group signature can be opened to track the user's identity,so as to ensure the anonymity and traceability of data transaction.Through the security analysis and comparison of the schemes,it is shown that the scheme has certain advantages in anonymity protection,traceability,and transaction security.(2)In order to ensure fair data transactions and prevent fraudulent transactions,a blockchain-based controllable data fair transaction scheme is proposed.The scheme uses smart contracts and inadvertent transmission protocols to realize autonomous,controllable,and fair data transactions,realizes payment fairness through smart contracts,uses inadvertent transmission protocols to achieve privacy protection and data verification in data exchange.And design arbitration mechanism to solve transaction disputes and improve transaction reliability.The data transaction smart contract is designed to standardize the data transaction process and payment steps,and the test results show that the scheme has high throughput.Finally,through the security analysis of the scheme,it shows that the scheme can guarantee the fairness of data transaction and improve the reliability of transaction exchange.