Secure processing of central bank digital currency (CBDC) card payments

Abstract

Central bank digital currency (CBDC) tokens are used for payment in a transaction initiated by a payment card at an acquirer's point-of-sale. To facilitate these transactions, a card issuer node in a distributed ledger environment receives a payment message from a payment terminal. The payment message, comprising a request to conduct a CBDC-based transaction, contains a signature transmitted to the payment terminal by a payment card. The card issuer node generates a signature data structure that contains the signature. The card issuer node also generates a transaction message containing components of the transaction, such as a number of tokens to be transferred, a current owner of the tokens to be transferred, an intended acquirer of the tokens, a currency type of the tokens, and/or instructions for validating the transaction. The transaction is validated based at least in part on the signature data structure in the transaction message.

CPC Classifications