Method and terminal for detecting fake and/or modified smart card
AssigneeNXP B.V.
InventorKeith Baker
Life of this patent
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Abstract
This invention relates to a method and a terminal for detecting a fake and/or modified smart card inserted into a physical interface of a terminal, the method comprising the steps of performing a sequence of current measurements by a current monitor in order to obtain a first current signature, comparing the obtained first current signature with a second current signature, representing a unique current signature of a smart card, and determining whether a difference exists within a predetermined range between the first current signature and the second current signature. This allows for simple detection of fake and/or modified smart cards. Further, it is possible to detect (and thereby protect against) false cards and/or ‘rouge’ application residing on a smart card.
Claims10
A terminal for detecting a fake and/or modified smart card inserted in a physical interface of the terminal, the terminal comprising:
- a controller configured to perform a sequence of current measurements in order to obtain a first current signature, and
- a current monitor for performing said sequence of current measurements,
- wherein the controller is further configured to:
- compare the obtained first current signature with a second current signature, representing a unique current signature of a smart card, wherein the second signature is an IDDQ signature or an ICCQ signature, and
- determine whether a difference exists within a predetermined range between the first current signature and the second current signature.
A method of detecting a fake and/or modified smart card inserted into a physical interface of a terminal, the method comprising:
- performing a sequence of current measurements by a current monitor in order to obtain a first current signature,
- comparing the obtained first current signature with a second current signature, representing a unique current signature of a smart card, wherein the second current signature is a IDDQ current signature or a ICCQ current signature, and
- determining whether a difference exists within a predetermined range between the first current signature and the second current signature.
Dependencies are inferred from the claim text.