A Blockchain-Based Trading Platform for Big Data

Nowadays, data is an extremely important asset. Governments around the world encourage big data sharing and trading to flourish the big data economics. However, existing data trading platforms are not fully trusted. Data providers lack control over data trading rights. Meanwhile, the data price model needs further justification. These issues hinder the development of big data trading. In this paper, we propose a blockchain-based decentralized data trading platform, on which data providers can better control data trading. Accordingly, we design smart contracts for distributed data trading and set rules to assign data rewards in trading. The contract guarantees the efficiency of data matching and fair reward distribution. We also adopt proxy re-encryption to ensure the security of data transmission. We verify the security, availability, and efficiency of the proposed big data trading platform.