Threshold private key generation method, transaction method and relevant device

Abstract

The invention discloses a threshold private key generation method, a transaction method based on a threshold signature and a relevant device. According to the threshold private key generation method,a first terminal system generates an initial private key and generates three corresponding sub-private keys according to a (2,3) threshold scheme, wherein the first terminal system and a second terminal system can arbitrarily save one sub-private key and can send another sub-private key to a central bank system. Since all the sub-private keys are generated according to the threshold scheme, signing cannot be completed unless a joint signature of two sub-private keys is available, and danger cannot be caused event if one sub-private key is lost. Similarly, since the three sub-private keys are generated, signing can be completed event if one sub-private key is lost. Therefore, grasp of the private key by a private key legal owner is realized, and transaction security is guaranteed. Besides,since all the three sub-private keys correspond to one initial private key, only one time of signature checking is required. Meanwhile, since one sub-private key is saved in the central bank system, it can be guaranteed that the central bank participates in supervision.

Description

technical field [0001] The present invention relates to the technical field of digital currency, and more specifically, relates to a threshold private key generation method and device, a computer-readable storage medium, a transaction method based on a threshold signature, a client wallet system, and a commercial banking system. Background technique [0002] Blockchain technology and related digital currency are research hotspots in recent years, and the security of digital currency wallets has always been an urgent problem to be solved. An important reason for the security of digital currency wallets is the security of the private key in the wallet. [0003] A digital currency wallet is a management tool for keys (including private keys and public keys). For example, use a private key to sign a transaction, thereby proving that you have the right to output the transaction. In the digital currency wallet, if you want to complete a transaction, you need to sign it with the ...

AI Technical Summary

Problems solved by technology

[0005] However, since the private keys of each party are completely independent and controlled by each relevant party, the wallet owner or security center cannot fully con

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