Digital currency anonymous double-offline transaction method and system based on trusted intermediary

Abstract

The invention discloses a digital currency anonymous double-offline transaction method and system based on a trusted intermediary. The method comprises the following steps that S1, the trusted intermediary exchanges digital certificates with a money sending party and a receiving party through a near field communication method; s2, the money sending party and the money receiving party complete offline transaction through the credible intermediary in an offline state; and S3, confirming the transaction through the commercial bank and the central bank in an online state. The method has the beneficial effects that anonymous double-offline transaction of digital currency can be realized, so that a money sending party and a money receiving party can complete anonymous identity transaction by using a credible intermediary in a double-offline transaction stage, then the transaction is confirmed by using a commercial bank and a central bank in an online transaction stage, collection is convenient, the digital currency obtained in the offline transaction can be used, and the transaction efficiency is improved. Compared with the prior art, the method can better protect the privacy information of the user, and enables the transaction (especially double offline transaction) to be safer.

Description

technical field [0001] The present invention relates to the field of information technology, in particular to a trusted intermediary-based digital currency anonymous double offline transaction method and system. Background technique [0002] At present, with the rapid development of the times, the digital currency payment method is favored by more and more people. The digital currency payment tool (DC / EP, Digital Currency and Electronic Payment) is used as a digital alternative to cash banknotes. It is of great significance for building a cashless society. [0003] Patent No. CN201911053809 discloses an anonymous transaction method and system based on digital currency. Although it effectively solves the problem that the identity of the payee is easily locked by the payer, the patent can only conduct online transactions, making the user's temporary identity Subsequent transaction processes can only be carried out with the approval of its own server. When the user cannot comm...

AI Technical Summary

Problems solved by technology

[0003] Patent No. CN201911053809 discloses an anonymous transaction method and system based on digital currency. Although it effectively solves the problem that the identity of the payee is easily locked by the payer, the patent can only conduct online transactions, making the user's temporary identity Subsequent transaction processes can only be carried out with the approval of its own server. When the user cannot communicate with its own server, the payee of this method cannot use the user's temporary identity to verify its digital signature on the transaction (in digital-based In the digital signature of the certificate, because the user needs to hide his real identity, he cannot provide a digital certificate containing his real identity, and cannot prove the association between his temporary identity and his digital certificate, so his digital certificate cannot be used to verify his authority on the transaction. Digital signatures; in digital signatures based on ID cryptography, since users need to hide their real identities, they cannot provide their real identities, and cannot prove the association between their temporary identities and their real identities, so they cannot use their real identities to verify their The digital signature of the transaction), so the payee cannot recognize the legitimacy of the transaction and complete the entire transaction process without receiving any identity certificate from the sender, that is, the problem with this patented method is that it cannot perform dual offline transactions ( A double offline transaction is a transaction in which both the sender and the payee are offline)

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