Blockchain access authorization method and node

Abstract

The invention provides a blockchain access authorization method and a node. The method comprises the following steps: obtaining attribute information of an access node by utilizing a consensus accounting node, and then generating an attribute key according to the attribute information; enabling the access node requesting to access to also generate the same attribute key according to the attributeinformation of the access node, and therefore decrypting the transaction information encrypted by the consensus accounting node by using the attribute key generated by the consensus accounting node, so the security problem that a data owner shares transaction information in a limited manner can be effectively solved. According to the invention, the data provider is used as the provider of the CA certificate, and also serves as an authorization main body to design a ciphertext strategy; in other words, the attribute encryption is performed by providing an attribute strategy based on the ciphertext strategy, and an information access user applies for an access right through a blockchain network; the method gets rid of the dependence bottleneck on an authentication center CA, and the reliability and efficiency of privacy protection of transaction data are improved.

Description

technical field [0001] The invention belongs to the technical field of block chains, specifically, an access authorization method and nodes of block chains are designed. Background technique [0002] As the Internet leaps from information interconnection to value interconnection to order interconnection, blockchain technology emerges as the times require. Blockchain technology is a decentralized consensus accounting technology that is decentralized, tamper-proof, and open. Features such as transparency. In order to reduce the risk of collusion caused by the large-scale computing resource control network, the blockchain network adopts the method of group consensus to ensure the consistency of transactions. Group consensus is a mechanism that uses multi-node joint bookkeeping and voting. Specifically, the blockchain network is composed of several consensus bookkeeping nodes. Each bookkeeping node stores the full amount of books and votes independently to form a group decisio...

AI Technical Summary

Problems solved by technology

[0003] Although the blockchain network participates in a large number of accounting consensus nodes, in most cases transactions only occur between a limited number of transaction parties, such as: private item transactions, information sharing, data transfer, etc., all occur in a limited range, limited The transaction information generated by the transaction party has to be transmitted to the entire network, which not only increases the risk of privacy data leakage, but also reduces the efficiency of transaction concurrency

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