Research on cloud computing data sharing system based on blockchain (Withdrawal Notice)
Liting Gao, Chen Zhang · 2022
When sharing data on the cloud platform, cloud computing users will face high-risk risks such as data leakage. The traditional way of going to the cloud through data encryption has disadvantages in flexibility and execution efficiency. With the help of the decentralized consensus and tamper proof characteristics of blockchain, a model and implementation scheme based on blockchain are proposed. The double-layer structure of private chain and public chain is adopted. The data is queried and analyzed according to the specification through metadata, and the query results can be verified. The data is stored in the private chain, and the private chain block is stored in the public chain. The calculation is carried out through the smart contract, and only the data results are returned. The data will not be leaked to the third party, let alone sensitive problems. The data encryption adopts the identity based public key encryption algorithm without public key certificate authentication to ensure the encryption performance. Simulation results show that the proposed scheme is operable. This paper will take the typical cloud data sharing scenario of "financial supermarket" as an application case to prove it.