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Block chain data access control method, node and system

A data access control and data access technology, applied in the field of blockchain, can solve problems affecting data security, etc., and achieve the effect of improving data security

Active Publication Date: 2021-09-24
NEUSOFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this way, after the decryption key is granted to Node B, it is difficult to manage and control the data access process of Node B, which may affect data security

Method used

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  • Block chain data access control method, node and system
  • Block chain data access control method, node and system
  • Block chain data access control method, node and system

Examples

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Embodiment Construction

[0081] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0082] Before introducing the blockchain data access control method, node and system of the present disclosure, the application scenarios of the present disclosure are introduced first. Various embodiments provided in the present disclosure can be applied to data interaction scenarios in a blockchain network, so that the data interaction process between blockchain nodes can be managed and controlled. Wherein, the block chain may be, for example, a public chain, a consortium chain, and the like.

[0083] In related scenarios, data interaction can be performed between nodes in the blockchain network. For example, node A can encrypt relevant data and upload th...

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Abstract

The invention relates to a block chain data access control method, node and system, and the method applied to a target node in a block chain network comprises the steps: responding to a received contract call request sent by a data request node, and based on a data access control contract, executing the following operations: receiving a data request sent by the data request node, wherein the data request comprises identity information of a data request node and a part of key fragments used for decrypting encrypted source data, the encrypted source data is obtained by encrypting source data by a data source node based on an encryption key, and the data source node divides a decryption key corresponding to the encryption key into a plurality of key fragments; sending a key acquisition request to a data source node to obtain at least one key fragment sent by the data source node; decrypting the encrypted source data based on the key fragment sent by the data request node and the key fragment sent by the data source node; and sending the source data obtained by decryption to the data request node.

Description

technical field [0001] The present disclosure relates to the technical field of blockchain, and in particular, to a blockchain data access control method, node and system. Background technique [0002] Blockchain is a technology that can collectively maintain a reliable database through decentralization and trustlessness. It can store transactions that occurred within a period of time in units of blocks, and use cryptographic algorithms to connect the blocks in chronological order to form a data structure similar to a chain. [0003] In related scenarios, data interaction can be performed between nodes in the blockchain network. For example, node A can encrypt relevant data and upload it to the blockchain. Correspondingly, when node B requests the data from node A, node A may obtain the corresponding decryption key, so as to obtain the corresponding data by decrypting the encrypted data. However, in such a manner, after the node B is granted the decryption key, it is diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/08H04L9/32G06F21/62G06F21/60
CPCH04L63/10H04L63/108H04L9/085H04L9/0819H04L9/3239H04L9/3263H04L63/0442G06F21/6218G06F21/602H04L9/50
Inventor 王诗鈞刘思瀚何光宇徐石成
Owner NEUSOFT CORP
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