What Is Dual Trading?

Double payment (also known as one-currency overpayment ) is a concept of a digital currency failure mode, that is, the same digital token can be used more than twice. Unlike physical currency such as coins, electronic files can be copied, so using this behavior does not remove the state of ownership from the original holder, that is, "creating" paid but not removed currency, In addition, the same amount of currency that has been paid by the beneficiary, or the amount that the beneficiary paid more than the amount of money, is like a counterfeit banknote, which causes inflation and depreciates the currency, so that it is no longer trusted and willing to hold. And circulation. [1] [2] Other measures are needed to prevent double payments.

Digital currency (English: Digital currency)

Usually a trusted third party online verifies whether a digital token has been used, which is a single point of vulnerability from the perspective of trust and information security. ^[1]

In 2007, several decentralized double payment prevention methods were proposed.

Operated in 2009

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