Data storage method of block chain system, nodes and block chain system

Abstract

The invention provides a data storage method for a block chain system, nodes and a block chain system. The data storage method comprises the following steps of: for the any first node in the block chain system, respectively acquiring a shared secret key between the first node and the other second nodes in the block chain system; acquiring the transaction information of the transaction initiated bythe first node; processing the transaction information through each shared secret key and a preset keyed hash algorithm to obtain a hash tag; broadcasting the transaction information and the hash tagto each second node; determining an honest node from nodes comprised in the block chain system according to the verification message broadcasted by each second node; and if the honest node determinesthat the transaction is a real transaction, the honest node storing the transaction information in a newly generated block for a main chain. The verification message comprises a result of the secondnodes verifying the authenticity of the transaction. According to the data storage method, the block chain system can resist quantum attacks, and the throughput falling of the block chain system is avoided.

Description

technical field [0001] The present invention relates to the technical field of data processing, in particular to a data storage method of a block chain system, a node and a block chain system. Background technique [0002] As a new type of Internet database technology, blockchain has the characteristics of decentralization, openness and transparency, and has a wide range of application values ​​in financial services, supply chain management, cultural entertainment, intelligent manufacturing, social welfare, education and employment. Based on the consensus mechanism and cryptographic technology, transactions on the blockchain network cannot be tampered with or denied. Among them, the consensus mechanism is used to ensure that the transaction information / block information is agreed in the entire blockchain network, and the cryptographic technology is used to To ensure the security, reliability and privacy protection of transaction information / block information. [0003] Howev...

AI Technical Summary

Problems solved by technology

[0005] For the current method of realizing the anti-quantum attack of the blockchain system, the length of the public key and signature of the post-quantum signature algorithm is much larger than that of the traditional digital signature algorithm. Implementing these signatures in the blockchain system will make the transaction The data volume of the data increases significantly, which in turn leads to a decrease in the throughput of the blockchain system

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