Method and system for converting digital currency into real cash

Abstract

The invention provides a method and a system for converting a digital currency into real cash, and aims to overcome various deficiencies in the prior art. The method comprises the steps that a user terminal device selects an equivalent digital currency in a digital currency wallet according to a cashing amount input by external operation; the user terminal device sends the digital currency to a central bank digital currency system through a commercial bank digital currency system; the central bank digital currency system generates a disposable withdrawal code and sends the disposable withdrawal code to the user terminal device to present the disposable withdrawal code to a user, and changes owner information of the digital currency to a central bank from the user; the commercial bank digital currency system sends the disposable withdrawal code provided by the user to the central bank digital currency system; the central bank digital currency system confirms that the disposable withdrawal code is valid, then adds the cashing amount to a commercial bank account, and feeds back the cashing amount to the commercial bank digital currency system; and the commercial bank digital currency system sends out a contribution instruction according to the feedback.

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...

AI Technical Summary

Problems solved by technology

[0010] 2. Non-repeatable spending: digital currency can only be used once, and repeated spending can be easily checked;

[0011] 3. Controllable anonymity: Banks and merchants cannot track the use of digital currency even if they collude with each other. It is required that the system cannot link the purchase behavior of users of electronic cash together, thereby concealing the purchase history of digital currency users. However, the issuer of digital currency Use of digital currency can be tracked;

[0012] 4. Unforgeab

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