A blockchain security transaction method and device based on biometric mark authentication

Abstract

The embodiment of the present invention discloses a block chain security transaction method and device based on biometric signature authentication. When the transaction between the payer and the receiver is generated as a digital transaction voucher for the transaction between the two parties, it is no longer only through random numbers. The legality of the transaction is authenticated, but the transaction key generated according to the biometric encrypted information of the recipient user is used as the digital transaction certificate of the transaction. Due to the uniqueness of the biometric encrypted information, it can be guaranteed that the transaction only occurs between the payer and the receiver designated by the payer. This method realizes the authentication of legal identity information of both transaction parties from the perspective of underlying blockchain information encryption, ensures that a digital transaction certificate can only be used once in a transaction, and avoids the problem of double payment. In addition, when the user's key is lost or the account is stolen, the uniqueness of the biometric encrypted information can also be used to perform identity authentication and restore the user's digital assets.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of secure transactions, and in particular, to a method and device for secure transaction of blockchain based on biometric signature authentication. Background technique [0002] Blockchain technology is a method that uses hash encryption to concatenate data blocks containing transaction information into a linear linked list structure and publish it on the network. The formation of each data block (block) needs to be jointly encrypted with the tail block data information of the current blockchain, the current timestamp information, and a temporarily generated random number (nonce). This random number must be able to make the generated encrypted block meet the so-called "partial hash collision" requirement, that is, the string generated by SHA-256 encryption from left to right is all 0. It is generally believed that using massive computing power to brute force is the fastest way to ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is how to solve the existing method of conducting secure transactions through the block chain. Since the transaction digital certificate does not contain the information of the recipient, it can be used before the transaction information is broadcast to each node. Digital certificates are traded with multiple recipients, and only one of these multiple transactions is a legal transaction, and the others are false transactions

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