关键词: 数据湖, 区块链, 智能合约, 隐私保护

Abstract:

Data lake is the most commonly used method of data sharing in big data applications. However, the privacy problem caused by data sharing is still a missing part in the design of data lake, especially the higher requirement of data confidentiality in power grid. In order to facilitate the flow of valuable data, the lack of data privacy in existing data lakes must be completed so that data can be more securely shared across domains. In this regard, this paper proposes a data access and sharing model and optimizes the smart contract module in the blockchain. The experimental result shows that storing the hash value of the data in the block chain and storing the encrypted original data in the data lake with the trusted execution environment not only achieves the purpose of data access control and security sharing, but also reduces the gas usage and system throughput required for operations.

Key words: data lake, blockchain, smart contract, privacy protection