Method and system for exchanging cash for digital currency

Abstract

The present invention provides a method and system for exchanging cash for digital currency, which can obtain digital currency flexibly and conveniently, and satisfies the needs of people at different levels for digital currency acquisition. The method includes: the commercial bank outlet system sends a first request to the commercial bank digital currency system, the first request includes the user terminal identification; the commercial bank digital currency system withdraws the digital currency from the account of the commercial bank according to the amount specified by the first request and send the second request to the central bank's digital currency system; the central bank's digital currency system receives the second request, and executes the operation of the preset project according to the second request and returns an indication of successful operation to the commercial bank's digital currency system, pre-set The operation of the project includes the operation of changing the owner of the digital currency extracted by the commercial bank digital currency system; the commercial bank digital currency system sends the extracted digital currency to the user terminal after receiving the instruction of successful operation.

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 cash for digital currency. 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 transaction...

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. Unforgeability: Users cannot forge fake digital currency;

Especially when the user does not have a bank account in a commercial bank or when the balance of the user's bank account is insufficient, it will not be possible to exchange digital currency through the mobile terminal

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