Data support with tan-generator and display
The invention creates a data carrier, in particular chip card, in particular smart card, having a device for generating one-time passwords and having a display for displaying generated one-time passwords. Preferably the data carrier is a Eurocheque card or credit card with the integrated function of an electronic purse (cash card function) and the generated one-time password is a transaction number (TAN) for acknowledging a secure electronic payment transaction.
1. A data carrier comprising:
a card body;
a device located on the card body;
an actuating display for displaying generated one-time passwords located on a surface of the card body;
display control means that actuates the actuating display, wherein the device is connected by at least one data line to one of the actuating display and the display control means, and wherein the device only operates during generation of the one-time passwords, and the display control means is electrically connected to a display memory that stores the one-time passwords received from the device to which the display memory is electrically connected;
a hardware switching device located on the card body that selectively electrically connects the device and the display control means to an energy source by:
connecting the energy source to the device to provide power to generate a one-time password,
disconnecting the energy source from the device immediately after the one-time password has been generated and saved, and connecting the energy source to the display control means to provide power for displaying the generated one-time password on the actuating display; and
wherein the hardware switching device is a system controller module.
2. The data carrier according to claim 1 , wherein the generated one-time password is a transaction number (TAN).
3. The data carrier according to claim 1 , wherein the data carrier is a payment transaction card.
4. The data carrier according to claim 1 , wherein the data carrier is an electronic purse.
5. The data carrier according to claim 4 , wherein the actuating display is configured to display pieces of information of the electronic purse.
6. The data carrier according to claim 1 , wherein the display control means has a lower power consumption than the device.
7. The data carrier according to claim 1 , wherein the display memory being electrically connected between the device and the display control means, and the display control means for retrieval of the generated one-time password directly from the display memory to be displayed on the display.
8. The data carrier according to claim 7 , wherein the display memory is a volatile memory arranged in a retention mode, during which a memory content of the display memory is arranged under low power supply.
9. The data carrier according to claim 8 , wherein the hold time is at least one second.
10. The data carrier according to claim 7 , wherein the display memory is a volatile memory arranged to be operated in a retention mode, during which a memory content of the display memory is arranged to be held under low power supply.
11. The data carrier according to claim 7 , wherein the display memory is a non-volatile memory.
12. The data carrier according to claim 1 , further comprising a display memory for holding generated one-time passwords for display, the display memory being electrically connected between the device and the display control means, the one-time password stored in the display memory, and the display control means for retrieval of the generated one-time password directly from the display memory to be displayed on the display after interruption of the energy to the device.
13. The data carrier according to claim 1 , comprising: an access check device, for generating a one-time password only upon successful entry of a predetermined access identification key.
14. The data carrier according to claim 1 , comprising: an access check device, which permits the operation of the data carrier for generating a one-time password only upon successful entry of a predetermined access identification key.
15. The data carrier according to claim 14 , comprising: an access operating unit for operating the access check device.
16. The data carrier according to claim 13 , comprising: an access operating unit, wherein an energy operating unit and the access operating unit are formed by a common universal operating element.
17. The data carrier according to claim 1 , comprising: a biometric detection device for detecting biometric data.
18. The data carrier according to claim 17 , wherein the biometric detection device is at least one of a finger print sensor and a camera.
19. The data carrier according to claim 1 , comprising a manually actuated energy operating unit for operating the switching device.
20. The data carrier according to claim 1 , wherein the switching device disconnects the energy source from the display control means after the one-time password has been displayed for a predetermined amount of time.