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Information sharing and secure multi-party computing model based on block chain

A secure multi-party computing and information sharing technology, which is applied in the field of blockchain-based sharing and secure multi-party computing models, can solve the problems that users cannot independently control and obtain data, and achieve the effect of not being easy to attack and fast processing speed

Inactive Publication Date: 2019-02-26
全链通有限公司
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a block chain-based information sharing and secure multi-party computing model, through the method of combining block chain and secure multi-party computing, to solve the problem that traditional secure multi-party computing prevents users from independently controlling data, third-party organizations It is very likely that the problem of obtaining data for self-interest

Method used

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  • Information sharing and secure multi-party computing model based on block chain
  • Information sharing and secure multi-party computing model based on block chain
  • Information sharing and secure multi-party computing model based on block chain

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Embodiment Construction

[0027] The realization steps of the present invention are as follows:

[0028] Step 1, build an off-chain data storage model

[0029] In this step, sensitive information and information with a large amount of data are stored off the chain, and index information of users and documents and information with a small amount of data are stored on the chain. Neither the user nor the organization that needs to use the data can change the data at will, thus ensuring the security of the data.

[0030] The user classifies the file information to be uploaded, such as business information, medical information, etc., and publishes the classification, and then encrypts the data in the corresponding classification with a public key and stores it in the off-chain database to form an encrypted file. After that, the stored The address value is returned to the chain and stored in the index table. like figure 1 As shown, the specific steps are as follows:

[0031] 1a) The data owner classifies...

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Abstract

The invention discloses an information sharing and safe multi-party computing protocol based on a block chain, mainly solves the problem that the existing secure multi-party computation is easy to cause the user to be unable to control the data independently that is easy to get the data by the third party. The technical solutions are as follows: 1) constructing the storage model, and storing the index table information on the chain and the database under the chain in the way. 2) constructing a data sharing model,wherein users can access their data by authorizing a third party or revoke their privileges at any time. 3) using the consensus mechanism of the block chain to ensure the consistency among nodes; 4) Based on the correctness of nodes, using MapReduce programming model, the model isdivided into two phases: Map and Reduce, and the master node assigns the tasks of Map and Reduce to the nodes; 5) Map node uses the improved homomorphic encryption algorithm for encryption calculation; 6) Reduce node integrates the encrypted data to output data files.

Description

technical field [0001] The invention belongs to the technical field of information security, and relates to a blockchain-based shared and secure multi-party computing model. Background technique [0002] With the rapid development of today's society, the degree of digitization and informatization is getting higher and higher, and data privacy has a great impact on life and work. In fields such as healthcare and finance, data privacy protection has become a top priority. Different from the centralized Thaksin mechanism of the traditional system, blockchain technology has the feature of sharing trust with a trusted third party, allowing users to control their own data. The data of the blockchain is open to everyone, and anyone can query the data through the open interface, and the entire system information is highly transparent. Therefore, as a distributed and verifiable ledger, blockchain can build the basis of a feasible and secure computing platform. [0003] Secure multi...

Claims

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Application Information

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IPC IPC(8): G06F21/60G06F21/62
CPCG06F21/602G06F21/6218G06F21/6227
Inventor 路成业王凌王童
Owner 全链通有限公司
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