Patent ID: 11941605
Assignee: WORLDLINE SA
Field: IT methods for management (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. A communication system for carrying out an electronic transaction, comprising:
a terminal device configured to:
assign a transaction identifier to the electronic transaction for a time interval starting with transmission of initiation data including the transaction identifier to a mobile device, and
carry out an initiation communication with the mobile device by means comprising near field communication (NFC), visible light communication, acoustic communication, or a combination thereof when the mobile device is brought into close proximity to the terminal device, wherein the initiation communication between the terminal device and the mobile device is a unidirectional communication in which a data signal comprising the initiation data is transmitted from a communication means of the terminal device to a communication means of the mobile device;

a computer host system comprising a terminal host associated with the terminal device and a mobile host associated with the mobile device, wherein the terminal host is configured to store the transaction identifier; and
the mobile device configured to:
suppress, by a transaction application of the mobile device, that the mobile device acts in a transmitting mode for providing transactional data, and, instead effect that the mobile device acts in a receiving mode for receiving the initiation data from the terminal device,
receive the initiation date from the terminal device, and
after receiving the initiation data from the terminal device, participate in further communications via the internet with the terminal host including transmitting the transaction identifier to the terminal host in order to initiate carrying out the electronic transaction;

wherein the electronic transaction is carried out only under the condition that a match between the transmitted transaction identifier and the stored transaction identifier is determined by the terminal host, and
wherein the time interval belongs to a group comprising a predefined time interval and a time interval extending to the end of the electronic transaction, in order to allow the terminal device to securely carry out a plurality of electronic transactions with different mobile devices in parallel based on different transaction identifiers.