An efficient security data deduplication method and system based on user perception

Abstract

The present invention provides an efficient and secure data deduplication method based on user perception, including: the client adopts hash-based convergent encryption assisted by a key server to deduplicate cross-user file-level data; Convergent encryption performs block-level deduplication within users; adopts multi-level key management, uses file-level keys to encrypt block-level keys, and uses secret sharing to divide file-level keys into shard-level keys and store them in distributed keys server. The invention also provides an efficient security data deduplication system based on user perception. The present invention adds random information by using hash-based convergent encryption assisted by a key server at the file level and user-assisted convergent encryption at the block level to randomize the user's file-level and block-level keys, which can effectively resist the opponent's Brute force cracking attacks ensure the confidentiality and security of user data; a multi-level key management scheme is used to ensure key security and reduce key space overhead.

Description

technical field [0001] The invention belongs to the field of computer storage, and more specifically relates to a method and system for deduplication of efficient and secure data based on user perception. Background technique [0002] In recent years, with the rapid development of cloud computing, more and more users and enterprises back up their data to cloud storage. IDC predicts that by 2020, the scale of global electronic data will exceed expectations, reaching 44ZB. A large number of recent studies and investigations have shown that there is a large amount of duplicate data among different users and within users in storage systems, especially in backup systems. The growth of online digital content has led to an increase in the cost of storage systems including hardware and human maintenance. It is extremely important to reduce the amount of data in the process of transmission and storage management. Cloud backup systems usually store and operate several copies of the ...

AI Technical Summary

Problems solved by technology

The DupLESS method is only suitable for file-level deduplication, and there is a huge computational overhead for block-level deduplication

Second, cutting-edge convergent key management schemes have many limitations, including huge key space overhead and single points of failure

At the same time, in order to ensure the security of the key, users usually use their own private key to encrypt the key of the data block, so that the user's private key has a single point of failure problem

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