Abstract: In order to solve the problem of low transaction confirmation efficiency and low storage space utilization in the process of data storage and sharing on the blockchain, this paper proposes a blockchain networking scheme based on cloud platform deployment and its adapted data shared storage solution. Firstly, by decomposing and reconstructing the traditional fully connected blockchain network, a subnet-based non-all-connection networking scheme is formed, which limits the scope of transaction confirmation to a limited number of nodes. Secondly, through managing the data sharing mechanism of cloud computing which divides the data into three levels: transaction data-sensitive state data-non-sensitive state data, the node only saves the transaction data related to the state transition to ensure the non-destructive modification, and the state data is supported by the cloud. The calculated features can enable different levels of shared storage and maximize storage space. The experimental results show that the scheme can provide new ideas for the storage and sharing of trusted data in the blockchain.

Key words: cloud computing, blockchain, data sharing