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 payer node in a distributed ledger environment receives communication metadata that includes a communication value and a communication key from a payment device. The payer node can generate a communication structure that includes indications of input tokens to be spent in the transaction, as well as an output token associated with the communication key. The payer node can transmit the communication structure to a second node for verification of the signature and subsequent validation of the transaction.

Abstract: A message interface system is provided that allows for local nodes to communicate with remote nodes securely. The message interface system provides a secure zone system that includes a reverse proxy server and a proxy server that interface with an internal firewall and an external firewall. The message interface system also includes a bridge system that is behind the internal firewall and that directs the secure zone system to establish connections with remote nodes, sends outbound messages of the local node to the proxy server for sending to the remote nodes, and receives inbound messages from the reverse proxy server sent from the remote nodes. The secure zone system helps ensure that the effects of a cyberattack are limited to the secure zone system without compromising business data of the local node.

Abstract: A message interface system is provided that allows for local nodes to communicate with remote nodes securely. The message interface system provides a secure zone system that includes a reverse proxy server and a proxy server that interface with an internal firewall and an external firewall. The message interface system also includes a bridge system that is behind the internal firewall and that directs the secure zone system to establish connections with remote nodes, sends outbound messages of the local node to the proxy server for sending to the remote nodes, and receives inbound messages from the reverse proxy server sent from the remote nodes. The secure zone system helps ensure that the effects of a cyberattack are limited to the secure zone system without compromising business data of the local node.