基于联盟链的安全公平细粒度数据交易方案

A Secure and Fair Fine-Grained Data Trading Scheme Based on Consortium Blockchain

针对当前区块链数据交易中数据安全、数据滥用、数据隐私等问题,提出一种基于联盟链与属性基加密的数据交易方案,为满足数据卖家的细粒度访问控制的需求,提高数据价值,利用密文策略属性基加密技术保护待售数据安全,保证只有拥有特定属性的数据买家才可以购买并正确解密数据;针对数据交易中身份隐私保护与监管追溯难以平衡问题,引入智能合约以及群签名技术实现了数据交易的安全可信以及匿名可追溯。最后,对提出的方案进行安全性分析以及仿真实验,结果表明所提方案可以实现安全公平的细粒度数据交易。

This paragraph presents a data trading scheme that leverages a consortium blockchain and attribute-based encryption to address various issues such as data security, misuse, and privacy in blockchain data trading. In order to meet the fine-grained access control requirements of data sellers and increase data value, the scheme employs ciphertext-policy attribute-based encryption technology to secure data for sale and ensure that only data buyers with specific attributes can purchase and correctly decrypt the data. Furthermore, to strike a balance between identity privacy protection and regulatory traceability in data trading, the scheme utilizes smart contracts and group signature technology to achieve secure and anonymous traceability of data trading. Finally, through security analysis and simulation experiments, the effectiveness of the proposed scheme is demonstrated in achieving efficient and fine-grained data trading.