Method for generating and displaying a security code for a payment card, payment card
AssigneeCb Investissements
InventorSerge Gautier
Life of this patent
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Abstract
A payment card comprises a display device arranged on a face of the payment card, the display device comprising a field for displaying a security code for card verification operations carried out by a card verification server. The method comprises the operations of: displaying, in the field of the display device, a first value of the security code during a first time period, displaying, in the field of the display device, a second value of the security code during a second time period that follows the first time period, the first and second time periods being of different durations.
Claims8
A method for generating and displaying a security code for a payment card comprising a display device arranged on a face of the payment card, the display device comprising a field for displaying a security code for card verification operations performed by a card verification server, the method comprising the steps of:
- displaying, in the field of the display device, a first value of the security code during a first time period,
- displaying, in the field of the display device, a second value of the security code during a second time period that follows the first time period, the first and second time periods being of different durations,
- wherein a switchover operation from the first time period to the second time period is carried out when a time counter exceeds a first switching threshold value associated with the first time period, the time counter being incremented by an internal clock of the payment card that is not synchronized with the card verification server.
A payment card comprising
- a display device arranged on a face of the payment card, comprising a field for displaying a security code for card verification operations performed by a card verification server, and
- a control circuit arranged to control the displaying, in said field of the display device, at least of a first value of the security code during a first time period and of a second value of the security code during a second time period that follows the first time period, the first and second time periods having different durations,
- wherein the control circuit comprises:
- a memory for storing a time counter and at least one switching threshold value,
- an internal clock that is not synchronized with outside the card, for incrementing the time counter, and
- a processing circuit for switching from the first time period to the second time period when the time counter exceeds a first switching threshold value associated with the first time period.
A non-transitory computer readable storage medium, having stored thereon a computer program for a payment card, said program comprising instructions for carrying out the steps of a method for generating and displaying a security code for a payment card comprising a display device arranged on a face of the payment card, the display device comprising a field for displaying a security code for card verification operations performed by a card verification server, the method comprising the steps of:
- displaying, in the field of the display device, a first value of the security code during a first time period,
- displaying, in the field of the display device, a second value of the security code during a second time period that follows the first time period, the first and second time periods being of different durations,
- wherein a switchover operation from the first time period to the second time period is carried out when a time counter exceeds a first switching threshold value associated with the first time period, the time counter being incremented by an internal dock of the payment card that is not synchronized with the card verification server.
Dependencies are inferred from the claim text.