Big Data among Multiple Institutions Based on DAG Blockchain
Yingzi Zheng · 2022
The transparency and reliability, tamper resistance, traceability, etc. of blockchain technology enable it to protect privacy and share information. The purpose of this paper is to study the secure sharing method of big data among multiple institutions based on the DAG blockchain. This paper analyzes the development of big data and the importance of big data security sharing, as well as the shortcomings of existing security sharing schemes, introduces some theoretical basic knowledge used in the design of this paper, and introduces the big data security sharing scheme based on DAG blockchain. It includes three parts: the scheme architecture of GCP-ABE, the design of DAG block structure and the design of attribute encryption algorithm. The processing steps of encrypted files are described, and the computational cost of the GCP-ABE scheme is compared with the existing big data security sharing schemes through simulation experiments to prove that the scheme in this paper has good performance and functional advantages.