A cloud computing-based big data secure storage method and system

Abstract

This invention relates to the field of data security technology, specifically to a cloud-based big data secure storage method and system, comprising the following steps: initializing cloud service nodes, selecting data blocks to be securely stored, assigning identifiers to each data block, and sorting and classifying the data blocks using batch processing to obtain initialized data blocks. In this invention, by using key segmentation and storing partial keys across multiple secure cloud service nodes, the security of data in the cloud environment is greatly enhanced. A threshold cryptography model is used to construct decryption rules, ensuring that data can only be decrypted when a sufficient number of key fragments are collected, effectively preventing unauthorized access and data leakage. The strategy of dynamically adjusting the key replacement cycle adapts to the access frequency and dynamic changes of the stored data blocks, improving data confidentiality, integrity, and availability, especially in business scenarios with large and sensitive data volumes.

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