A BLOCKCHAIN-BASED SCHEME FOR CLOUD STORAGE DATA ACCESS CONTROL AND ANTI-COPYING
Jie Huang, JiangYi Yi · Journal of Computer Science and Electrical Engineering · 2024
This paper addresses data usage security issues and proposes a blockchain-based cloud storage data access control and anti-replication solution. The scheme introduces CP-ABE (Cipher Policy Attribute-Based Encryption) encryption technology and digital watermarking technology. By combining the two, a watermark embedding and CP-ABE encryption model based on orthogonal operation domains is proposed, and specific watermark embedding and CP-ABE encryption methods for image-type data based on orthogonal operation domains are provided. The solution stores request-confirmation records in the blockchain, further strengthening user access control rights and establishing a correlation between the requestor and the watermark in the data, preventing the requestor from denying the fact of their illegal copying. Through security analysis, the solution is shown to be secure and feasible.