Electronic authentication systems

A computer-implemented method of interacting with a point of interaction by a transaction device to carry out a transaction, the transaction device comprising an input for receiving transaction data from the point of interaction, a processor having a payment application for processing the received transaction data, and an output for outputting the processed transaction data back to the point of interaction, the payment application configured to output the processed transaction data formatted according to a given data format, and the processor comprising a communication module functionally disposed between the input and output and the payment application, the method comprising:

• receiving the transaction data, from the point of interaction, at the input;
• mapping, at the communication module, the transaction data received via the input to the given data format of the payment application;
• reformatting the transaction data output from the payment application to a data format suitable for the point of interaction;
• and
• sending the reformatted data output from the payment application to the point of interaction via the output.

A computer-implemented method of carrying out a transaction with a transaction device by a point-of-interaction device, the method comprising:

• sending, by the point-of-interaction device, a point-of-interaction message to the transaction device, the point-of-interaction message comprising:
• a data request component and a message data component, the data request component relating to a data request from the point-of-interaction device to the transaction device for data relating to the transaction, the message data component relating to message data satisfying a previous data request from the transaction device;
• receiving, by the point-of-interaction device, a transaction device message from the transaction device, the transaction device message comprising:
• a data request component and a message data component, the data request component relating to a data request from the transaction device to the point-of-interaction device for data relating to the transaction, the message data component relating to message data satisfying the data request from the point-of-interaction device in the point-of-interaction message;
• and
• completing the transaction based on the exchanged messages, whereby the transaction with the transaction device is carried out by the point-of-interaction device.

A computer-implemented method of carrying out a transaction with a point-of-interaction device by a transaction device, the method comprising:

• sending, by the transaction device, a transaction device message to the point-of-interaction device, the transaction device message comprising:
• a data request component and a message data component, the data request component relating to a data request from the transaction device to the point-of-interaction device for data relating to the transaction, the message data component relating to message data satisfying a previous data request from the point-of-interaction device;
• receiving, by the transaction device, a point-of-interaction device message from the point-of-interaction device, the point-of-interaction device message comprising:
• a data request component and a message data component, the data request component relating to a data request from the point-of-interaction device to the transaction device for data relating to the transaction, the message data component relating to message data satisfying the data request from the transaction device in the transaction device message;
• and
• completing the transaction based on the exchanged messages, whereby the transaction with the point-of-interaction device is carried out by the transaction device.