METHOD FOR REALIZING DIGITAL CURRENCY WALLET BY USING HARDWARE, AND HARDWARE WALLET

摘要

Disclosed are a method for realizing a digital currency wallet by using hardware, and a hardware wallet. The method comprises: a hardware wallet waiting to receive an instruction from an upper computer, and when receiving a balance query instruction, the hardware wallet generating, according to a master key in a secure storage area and a pre-set sub-key index, a sub-key pair by means of a key derivation algorithm, generating an account address according to a sub-public key in the sub-key pair, binding the account address and the sub-key index, and returning same to the upper computer; and when receiving a transaction instruction, the hardware wallet generating, according to the master key in the secure storage area and a sub-key index in the transaction instruction, a sub-key pair by means of the key derivation algorithm, signing transaction data in the transaction instruction by using a sub-private key in the sub-key pair to obtain a signature result, generating a transaction credential according to the sub-public key in the sub-key pair, and the signature result, and returning the transaction credential to the upper computer. The present invention belongs to the field of digital currencies and solves the problem of security of key storage.