Blockchain remote data audit supervision method, system, computer equipment and terminal

Abstract

The invention belongs to the technical field of block chain application, and discloses a block chain remote data audit supervision method, system, computer equipment and terminal to generate corresponding homomorphic label sets, and then transmit data blocks and label sets to The designated CSP sends the key auxiliary verification information to the regulatory agency and deploys the audit contract to the blockchain; each round of audit consensus obtains a random source through verifiable secret sharing technology, elects representative nodes, and collects the questioned CSP According to the corresponding proof generated by the challenge set and packaged into a block broadcast, all participating consensus nodes verify all audit proofs in the block; the regulator confirms the verification results of all nodes and broadcasts the consensus end message, and each node writes the new block into the ledger and Perform credit settlement; finally, the data owner obtains the latest audit results on the ledger. In the present invention, the data owner can still obtain trustworthy integrity audit results without participating in the verification process.

Description

technical field [0001] The invention belongs to the technical field of block chain application, and in particular relates to a block chain remote data audit supervision method, system, computer equipment and terminal. Background technique [0002] At present, with the rapid development of cloud computing, big data, and the Internet of Things, there is a demand for massive data storage, which may incur huge maintenance costs locally, and individuals or companies with limited resources prefer to use cloud storage services , but at the same time the data owner loses direct control over the remote data in the cloud. The third-party cloud service provider (CSP) is untrustworthy, that is, it may tamper, delete or lose data without the user's knowledge, so the availability and integrity of remote data are challenged by security threats. Therefore, a method of remote auditing is needed, so that the data owner can verify the correctness and integrity of the uploaded data without sto...

AI Technical Summary

Problems solved by technology

[0006] (1) The current solution that introduces TPA cannot fundamentally solve the problem of collusion among various entities in the solution, and the security assumption is not realistic enough, and the batch audit is still not efficient enough, and it is impossible to directly and accurately confirm the scope of the problem

[0007] (2) The current solution combined with the blockchain reduces the probability of CSP colluding with other entities through the proof of consistent records of multiple entities, but it still does not completely solve the problem of collusion, and the data owner still needs to find the proof from the chain and Verify that there is a significant overhead burden on resource-constrained data owners in the case of large amounts of data

How to achieve a small overhead on the client side while ensuring that the audit process is mutually trustworthy is a more difficult problem

[0008](3) Due to the different ways of verifying the integrity of the current blockchain solutions, most remote data updates require more overhead, and different audits Requests can only be authenticated serially

[0009] The difficulties in solving the above problems and defects are: (1) In the case that the audit results are credible to both the data owner and the CSP, at the same time ensure a relatively small audit overhead , which is also an important reason for the imperfect design of the current public audit program

(2) In the case of remote data updates from time to time and a large number of audit requests, the data owner needs less update overhead, and the verifier cannot afford a large verification overhead. This is also an important reason why the current public audit scheme is not efficient. reason

(3) When using blockchain technology to assist auditing, a more efficient and customized consensus solution is required. At the same time, it is necessary to be able to detect, arbitrate and punish the malicious behavior of participating entities in a timely manner. This is why the current blockchain auditing solution is not perfect. an important reason for

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