Cloud Storage Privacy Data Protection Technology Based on Blockchain

In order to cope with the increasingly serious risk of privacy data leakage in cloud storage services, this study builds a cloud storage privacy data protection model by introducing blockchain technology and utilizing its decentralized, immutable and transparent characteristics. This model can not only realize the encrypted storage of data, but also ensure the security and traceability of data in the process of transmission and access. Through the introduction of smart contracts, the fine-grained control and automatic management of data access rights are realized, which greatly improves the efficiency and security of data access. This paper also designs a set of perfect key management mechanism to ensure the safe storage and distribution of keys and prevent the risk of key leakage after a single node is breached. The experiment confirms that the cloud storage privacy data protection technology based on blockchain technology proposed in this study has higher data protection intensity and more flexible access control mechanism.