A method for preventing short-term bifurcation and double-spend attack on a block chain network

Abstract

The invention discloses a method for preventing short-term bifurcation and double-spend attack on a block chain network. The method comprises the following steps: adding a CA certificate issuing and updating center to the block chain network; transforming the block data structure, adding signature and public key fields based on CA certificate; adding certificate validity verification of signatureand public key to the consensus algorithm of block chain network nodes; improving consensus algorithm; in the improved consensus algorithm, adding short bifurcation malicious double-spend attack riskidentification. The method has small modification to the original chain, is easy to realize, only increases the CA center and modifies and adds the necessary consensus algorithm, can effectively reduce the possibility of short-term bifurcation double-spend attack, and provides effective real-name system evidence for the judicial investigation after the event through the real-name system CA certificate.

Description

technical field [0001] The present invention relates to the Internet / IT / financial field, in particular to a method for preventing short-term bifurcation double-spending attacks on blockchain networks. Background technique [0002] Blockchain technology, also known as distributed ledger technology, is an Internet database technology characterized by decentralization, openness and transparency. It was the underlying technology of Bitcoin at the earliest and is currently widely used in financial and other fields. At present, the BTG network has been attacked by a short-lived fork and double spend, which has caused a large amount of digital token losses to the exchange, and has once again questioned the security of the blockchain. [0003] Short-lived fork double-spending attack refers to: [0004] 1) The attacker takes advantage of the computing power (for the POW blockchain network) / equity (for the POS blockchain network) of the control node to fork the target chain (chain, ...

AI Technical Summary

Problems solved by technology

[0008] At present, there is no effective method in the blockchain network (POW consensus network / POS consensus network) to prevent malicious individuals or organizations (generally mining pools) with a large amount of resources from conducting short-lived bifurcation double-spending attacks. The present invention is Provide a method that can largely prevent short-lived fork double-spending attacks on blockchain networks