Research on Data Security Protection Strategies in Cloud Computing Environment

In today's increasingly complex and dynamic network structure, cloud computing brings great convenience to computer users and meets people's requirements for rapid computer data processing.The article firstly analyzes the cloud computing architecture and the security threats existing in the cloud environment, and explains the importance of cloud computing access control mechanism to ensure data security, starting from the traditional access control.Then it introduces the multiauthority attribute access control scheme based on blockchain and elliptic curve improvement, on the basis of which it proposes a blockchain-based cloud data security sharing model and a blockchain transaction privacy protection scheme, which both meets the user data privacy protection needs and realizes privacy computing.Finally, the security of the two schemes is analyzed, and compared with other schemes with the same mechanism.The results show that the blockchain-based cloud data security sharing scheme has better performance and scalability, which shows a stable linear growth of 1x, and the time load introduced by this scheme while enhancing the security of the encrypted data sharing system is acceptable compared to the other schemes to satisfy the application scenarios with large-scale access requests.At the same time, the blockchain transaction privacy protection scheme ensures data privacy while the average time consumed meets the user's requirements for fast response.