Block chain asset transaction transfer method based on weighted threshold signature algorithm

Abstract

The invention discloses a block chain asset transaction transfer method based on a weighted threshold signature algorithm. The specific implementation steps include: 1, generating a public-key privatekey pair of a group master; 2, distributING a weighted private key component; 3, generatING a message to be signed; 4, a plurality of group memberS form a signature group; 5, that group mast judges whet the signature group satisfies the threshold condition; 6, calculatING a signature private key component; 7, calculatING a temporary public key; 8, sending a signature component; 9, synthesizing acomplete signature; 10, verifying that signature; 11. Exiting the system. The invention adopts threshold signature algorithm, reduces the risk of private key disclosure, and guarantees the security ofblock chain asset transaction transfer. A weighted secret sharing technique based on Chinese Residue Theorem (CRT) is used to improve the efficiency of signature generation algorithm.

Description

technical field [0001] The invention belongs to the technical field of cryptography, and further relates to a blockchain asset transaction transfer method based on a weighted threshold signature algorithm in the technical field of network security. The present invention can be applied to the private key share distribution of the blockchain asset wallet and the joint signature of multiple signers on the blockchain asset transaction transfer message, which can effectively protect the confidentiality of the private key and improve the security of the blockchain asset transfer . Background technique [0002] An important concept in the blockchain asset system is the blockchain asset wallet. Blockchain asset transaction transfers are inseparable from the blockchain asset wallet. Fundamentally speaking, the blockchain asset wallet is a pair of private key and public key. collection. By using elliptic curve cryptography, wallets generate private keys, and then derive correspondin...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the private key of the blockchain asset wallet used by this method is in the hands of a single user when signing the blockchain asset transaction transfer information. Once the user’s wallet is hacked, the opponent can steal the user's private key and steal the user's legal property

However, this method still has shortcomings: the number of private key shares distributed to players by the system increases with the increase of player weight, which makes key management inconvenient when high-weight players participate in signatures, and the amount of signature calculation is large, which reduces the Signature generation efficiency of the entire system, and players use the same private key share each time they sign, vulnerable to passive attacks, and there is a risk of private key share leakage

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