A blockchain-based data storage method, device, and storage medium
A data storage and blockchain technology, applied in the information field, can solve the problems of information leakage, inconvenient retrieval and query of ciphertext data, account privacy and transaction information protection requirements cannot be fully met, etc., to achieve restrictions and ensure security. , the effect of improving safety
Active Publication Date: 2021-08-03
卓尔智联(武汉)研究院有限公司
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Problems solved by technology
[0002] Relevant technologies can store data in the blockchain database, but all the data is stored in the blockchain system in the form of open plaintext, which also causes serious information leakage, because any malicious server can obtain query user information. Query keywords, query results and other information
Therefore, there may be security issues in storing data in this way, some account privacy and transaction information protection requirements cannot be fully met, and the authority to view data cannot be controlled
However, if the data is directly encrypted and stored in the blockchain database, it will lead to the problem that the ciphertext data is inconvenient to retrieve and query
Method used
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[0051] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings, and the described embodiments should not be considered as limiting the present invention, and those of ordinary skill in the art do not make any All other embodiments obtained under the premise of creative labor belong to the protection scope of the present invention.
[0052]In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined arbitrarily with each other. The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.
[0053] Unless otherwise defi...
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The present invention provides a blockchain-based data storage method, device, and storage medium, including: generating a first key and a second key; encrypting plaintext data based on the first key to generate ciphertext data, and encrypting the ciphertext data Stored on the block chain; determine the data identification ID according to the storage information of the ciphertext data; the storage information includes: the storage location of the ciphertext data on the block chain and / or the storage order of the stored data on the block chain; The identification ID, the keywords of the ciphertext data, and the second key are encrypted to generate an index corresponding to the ciphertext data; the index is stored, and the index is used to match the query voucher of the query data during the data query process; the data identification ID is used for When the index matches the query credentials successfully, return the ciphertext data corresponding to the query data to the node sending the query request; the second key is used together with the subkey of the client node carried in the query request to determine whether the node sending the query request is Authorized nodes that have permission to query ciphertext data.
Description
technical field [0001] The present invention relates to the field of information technology, in particular to a block chain-based data storage method, device and storage medium. Background technique [0002] Relevant technologies can store data in the blockchain database, but all the data is stored in the blockchain system in the form of open plaintext, which also causes serious information leakage, because any malicious server can obtain query user information. Query keywords, query results and other information. Therefore, there may be security issues in storing data in this way, some account privacy and transaction information protection requirements cannot be fully met, and the authority to view data cannot be controlled. However, if the data is directly encrypted and stored in the blockchain database, it will cause the problem that the ciphertext data is inconvenient to retrieve and query. Contents of the invention [0003] In view of this, embodiments of the presen...
Claims
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IPC IPC(8): G06F16/22G06F16/2458G06F16/27G06F21/62
CPCG06F21/6227G06F21/6245G06F2221/2107G06F16/2291G06F16/2471G06F16/27
Inventor 向舜
Owner 卓尔智联(武汉)研究院有限公司