Cloud storage data security deduplication method based on block chain

Abstract

The invention discloses a cloud storage data security deduplication method based on a block chain. The method comprises the following steps: sending a generated file label to a cloud storage service provider for repeatability detection; if the result is file repetition, enabling the user to generate a file repetition storage log, executing the intelligent contract through the intelligent contract management center to integrate the storage log into a transaction and uploading the transaction to the block chain for storage, so that the current storage state information is safely stored; if the result is that the file is not repeated, enabling the secret key server to generate an authority secret key of the user by constructing a role hierarchical hash tree, executing safe encryption operation on the data by using the authority secret key, and uploading a ciphertext to the cloud storage server for storage; and generating a file non-repeated storage log and transaction under the assistance of the intelligent contract management center. According to the method, data security deduplication and storage of the cloud user can be achieved, malicious behaviors of stealing and tampering of a cloud storage service provider are resisted, the computing overhead of the cloud storage server is greatly reduced, and the privacy security is ensured.

Description

technical field [0001] The invention belongs to the technical field of block chains, and in particular relates to a method for safely deduplicating cloud data based on block chains. Background technique [0002] At present, cloud computing technology has been widely used in the information field, which can effectively allocate computing resources and improve the efficiency of data storage. With the continuous development of cloud computing technology, more and more users choose to outsource their data to cloud storage server providers, and cloud storage service providers are faced with the problem of data storage management in the big data environment. With the rapid growth of user data, a large amount of redundant data is uploaded and stored on the cloud storage server, which will consume a large amount of communication bandwidth and storage space of the cloud storage service provider. Data deduplication technology can detect and eliminate redundant data on the cloud stora...

AI Technical Summary

Problems solved by technology

However, due to the lack of effective encryption algorithm participation and the guarantee of security protocols, the confidentiality and security of data in the storage state and transmission state cannot be guaranteed.

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