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Cloud data deduplication method based on edge cloud collaboration

A technology of cloud data and edge nodes, applied in digital transmission systems, user identity/authority verification, secure communication devices, etc., can solve the problems of data insecurity and deduplication efficiency

Active Publication Date: 2022-05-13
HEBEI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a cloud data deduplication method based on edge-cloud collaboration to solve the problems of data insecurity and low deduplication efficiency in existing methods

Method used

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  • Cloud data deduplication method based on edge cloud collaboration
  • Cloud data deduplication method based on edge cloud collaboration
  • Cloud data deduplication method based on edge cloud collaboration

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Embodiment Construction

[0039] Such as figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 As shown, the cloud data deduplication method based on edge-cloud collaboration of the present invention includes the following steps:

[0040] A. Input the security parameter k in the key server to generate keys for each edge node.

[0041] Such as image 3 As shown, the system model of the present invention includes four entities: user, key server, edge node and cloud server. Users mainly include user groups based on the coverage of edge nodes. Each user may have two roles. When it is uploading data, it is the first uploader, and after passing the deduplication request, it is the later uploader. The user's functions mainly include encryption key blinding, data encryption, data label generation, data deduplication challenge generation, data upload and download, data decryption and verification. The main function of the key server is to generate the private key and the application's internal dedu...

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Abstract

The invention provides a cloud data deduplication method based on edge cloud collaboration, which is characterized by comprising the following steps of: A, inputting a security parameter k into a key server, and generating a key for each edge node; b, generating and outputting a file ciphertext C and an internal deduplication label for the user data; c, the edge node layer checks the consistency of the data and the internal de-duplication label, and de-duplication is carried out; d, the cloud server checks the consistency of the data and an external deduplication label cspdep, and deduplication is carried out; and E, decrypting the user file. According to the invention, a new end-side-cloud method is adopted to replace a previous end-cloud method, a partial de-duplication function of a cloud server sinks to an edge node layer close to a user, the edge node layer is adopted to execute internal de-duplication, and the cloud server executes external de-duplication. According to the new side cloud cooperation mode, the data deduplication efficiency is improved while the communication overhead is reduced.

Description

technical field [0001] The invention relates to the field of safe storage of cloud data, in particular to a cloud data deduplication method based on edge-cloud collaboration. Background technique [0002] Convergent encryption CE (convergent encryption) is an improved symmetric encryption algorithm. Its application in the data deduplication process is to calculate the hash value of the data file through the hash function, use it as the key for encrypting the data, and then use the symmetric An encryption algorithm such as DES encrypts the ciphertext, so that the user can get the same ciphertext for the same data file, so that the cloud server can deduplicate. [0003] The oblivious pseudo-random protocol OPRF (oblivious Pseudo-Random Function) refers to the key server-based assistance to obtain data encryption keys, and its steps include user initialization, key service blinding, and user deblinding are three processes. User initialization: The user randomly selects r∈Z_p^*...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/40H04L9/32H04L67/06
CPCH04L9/0861H04L63/0428H04L67/06H04L9/3247H04L63/123Y02D10/00
Inventor 石朋亮杜瑞忠王熙汪晓慧
Owner HEBEI UNIVERSITY
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