关键词: 区块链, 容灾备份, 状态监测, 云端协作, 共识机制

Abstract: Given that the challenges of data disaster recovery backup schemes, such as low data security, susceptibility to data loss and damage, and excessive reliance on third-party services, a data blockchain disaster recovery scheme for cloud-edge collaborative grid condition monitoring was proposed. First, a cloud-edge collaboration approach was adopted to enhance monitoring data backup efficiency. Then, the Paillier algorithm and threshold secret sharing were combined to encrypt monitoring data, achieving distributed backup protection. Finally, an improved Hot-Stuff consensus mechanism was applied to blockchain architecture to optimize consensus efficiency. Security analysis demonstrates that the proposed scheme ensures privacy, integrity, unforgeability, and correctness. Performance analysis shows that the scheme reduces backup and recovery latency, backup and recovery time, and computational overhead, while improving throughput.

Key words: blockchain, disaster recovery, condition monitoring, cloud collaboration, consensus mechanisms