Devices, system and method for electronic cashless payment

A trust center server arrangement for executing an electronic payment transaction, wherein the trust center server arrangement comprises:

• at least one processor, which is configured to execute a payment agent and an ID agent;
• a communication interface, which is configured to communicate with a data communication device;
• and
• a memory for storing electronic data;
• wherein the payment agent is configured to receive a transaction ID and a decentralized identity, DID, of a user of the data communication device from a payment application of the data communication device;
• wherein the ID agent is configured, in response to a request from the payment agent containing the DID for user credentials of the user of the data communication device, to obtain the signed user credentials of the user of the data communication device from an ID application of the data communication device;
• wherein the payment agent is further configured to obtain the user credentials of the user of the data communication device and to store them together with the transaction ID in the memory;
• and
• wherein the payment agent is further configured to sign the transaction ID and to send the signed transaction ID to the payment application of the data communication device in order to be able to register the electronic payment transaction with the signature of the transaction ID on a money ledger.

A system for executing an electronic payment transaction, wherein the system comprises:

• a plurality of data communication devices, wherein each of the plurality of data communication devices comprises:
• at least one processor, which is configured to execute a payment application and an ID application;
• and
• a communication interface, which is configured to communicate with a trust center server arrangement and a money ledger;
• wherein the payment application is configured to send a transaction ID and a decentralized identity, DID, of a user of the data communication device to a payment agent of the trust center server arrangement;
• wherein the ID application is configured, in response to a request containing the DID from an ID agent of the trust center server arrangement, to send signed user credentials of the user of the data communication device to the ID agent of the trust center server arrangement;
• wherein the payment application is further configured to receive a signature of the transaction ID from the payment agent of the trust center server arrangement and to send the signature of the transaction ID to the money ledger in order to register the electronic payment transaction with the signature of the transaction ID on the money ledger;
• and
• a trust center server arrangement comprising:
• at least one processor, which is configured to execute a payment agent and an ID agent;
• a communication interface, which is configured to communicate with a data communication device;
• and
• a memory for storing electronic data;
• wherein the payment agent is configured to receive a transaction ID and a decentralized identity, DID, of a user of the data communication device from a payment application of the data communication device;
• wherein the ID agent is configured, in response to a request from the payment agent containing the DID for user credentials of the user of the data communication device, to obtain the signed user credentials of the user of the data communication device from an ID application of the data communication device;
• wherein the payment agent is further configured to obtain the user credentials of the user of the data communication device and to store them together with the transaction ID in the memory;
• and
• wherein the payment agent is further configured to sign the transaction ID and to send the signed transaction ID to the payment application of the data communication device in order to be able to register the electronic payment transaction with the signature of the transaction ID on a money ledger.