Multi-cloud data storage method based on block chain
A data storage and blockchain technology, applied in the field of cloud computing, can solve problems such as excessive verification calculation and communication overhead, dependence on data integrity verification schemes, inability to protect resource-limited user data integrity, etc., and achieve low audit overhead , the effect of ensuring data security
Active Publication Date: 2020-09-22
HUNAN UNIV
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Problems solved by technology
For the existing technology of multi-cloud storage scenarios, there are still the following technical problems: 1. In the multi-cloud storage scenario, there are problems of excessive verification calculation and communication overhead; Data integrity; 3. The current data integrity verification scheme in a multi-cloud storage environment relies on trusted TPA issues
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.
[0033] Such as figure 2 As shown, the blockchain-based multi-cloud storage system of this embodiment includes a user U, an authoritative node AN, an organizer node O, and a cloud service provider CSP, wherein the cloud service provider CSP includes multiple cloud servers, Each cloud server is a storage location. A service level agreement (SLA) is reached through negotiation between the user U, the organizer node O and the cloud service provider CSP, and the smart contract of the blockchain is deployed. The authoritative node AN randomly generates prime numbers p and q, generates the base g of the hash function, and calculates the RAS modulus N=pq according to the prime numbers p and q, and releases the RAS modulus N and base g to the blockchain. The authorita...
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The invention discloses a multi-cloud data storage method based on a block chain, and the method comprises a data storage step: S1.1, enabling a user to divide to-be-stored data into data blocks, andcalculating a first label; sending the data blocks to an organizer node, and issuing a first label on the block chain, wherein the first label is a homomorphic verifiable label of the data block; S1.2, enabling an organizer node to receive the data blocks and allocate the data blocks to a cloud service provider; and S1.3, enabling a cloud service provider to receive the data blocks distributed bythe organizer node and calculate a second label, wherein the second label is a homomorphic verifiable label of the data block received by the cloud service provider; and acquiring the first label fromthe block chain, and when the second label is equal to the first label, storing the received data block by the cloud service provider. The method has the advantages that the multi-cloud storage datacan be audited without a third-party auditor, the data security is ensured, the auditing overhead is small, and the like.
Description
technical field [0001] The present invention relates to the field of cloud computing, in particular to a block chain-based multi-cloud data storage method. Background technique [0002] Network computing technologies such as cloud computing and transparent computing are widely used due to their powerful storage and processing capabilities. However, using network computing services on source data also has some security risks, such as the ownership of user data being transferred to the network. The cloud service provider (CSP, cloud service provider contains multiple cloud servers, also known as multi-cloud service provider) in the storage service, the separation of the data owner and the actual controller may cause the integrity and availability of the data to depend entirely on Due to the problem of the cloud service provider (CSP), the cloud service provider (CSP) may accidentally damage the user's data, or even maliciously delete the data to reduce the storage burden. In ...
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IPC IPC(8): H04L29/08H04L29/06
CPCH04L67/1097H04L63/123H04L9/50
Inventor 徐旸张程秦拯胡玉鹏刘琴张尧学
Owner HUNAN UNIV