Method and system for converting digital currency into physical cash

A technology of digital currency and cash, applied in the field of computer network and computer software, can solve the problems of unforgeability, inability to complete by itself, inconvenient use, etc.
CN107230071BActive Publication Date: 2021-07-06THE PEOPLES BANK OF CHINA DIGITAL CURRENCY INST
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
THE PEOPLES BANK OF CHINA DIGITAL CURRENCY INST
Publication Date
2021-07-06

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Abstract

The invention provides a method and system for exchanging digital currency into physical cash to solve various deficiencies in the prior art. The method of the present invention includes: the user terminal equipment selects equivalent digital currency in the digital currency wallet according to the cash amount input by the external operation; the user terminal equipment sends the digital currency to the central bank digital currency system through the commercial bank digital currency system; the central bank The digital currency system generates a one-time withdrawal code and then sends it to the user's terminal device for presentation to the user, and changes the ownership information of the digital currency from the user to the central bank; the commercial bank digital currency system sends the one-time withdrawal code provided by the user To the central bank's digital currency system; the central bank's digital currency system confirms that the one-time withdrawal code is valid, then increases the cash amount in the commercial bank account, and feeds back to the commercial bank's digital currency system; the commercial bank's digital currency system issues a contribution instruction based on the feedback.
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Description

technical field

[0001] The invention relates to the technical field of computer network and computer software, in particular to a method and system for exchanging digital currency into physical cash. Background technique

[0002] Digital currency is a currency that converts cash values ​​into a series of electronically encrypted serial numbers. The security of the currency itself depends on cryptographic algorithms for protection. In terms of cryptographic algorithms, the security of digital currency systems involves symmetric ciphers, asymmetric ciphers, message digest algorithms, and identity-based cryptographic systems. In terms of system implementation, the overall security of cryptographic systems, the selection of cryptographic algorithms, and cryptographic algorithms must be deeply considered. The implementation of algorithms, the design of interactive protocols, the compatibility of international and domestic standards, etc., ensure the security of digital currency t...

Claims

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