Access Control and Anti-copy Scheme of Cloud Storage Data Based on Blockchain

Cloud Storage is the fundamental service which is widely used by users of cloud computing. Cloud offers many advantages such as flexibility, elasticity, scalability and data sharing among users. However, the physical separation of cloud storage data and users brings many data security issues. This article focuses on the solution of the security issues, which contains the access control of cloud storage data and the illegal copy of the use process. A watermark embedding and CP-ABE encryption model based on orthogonal operation domain is proposed. Based on this model, a blockchain-based cloud storage data access control and anti-copy scheme is proposed. In order to illustrate the feasibility of the model and the scheme, a watermark embedding and CP-ABE encryption method based on orthogonal operation domain is designed for image type data. Experiments have been carried out to prove the feasibility of the method and scheme.