Data processing: measuring – calibrating – or testing – Measurement system – Measured signal processing
Reexamination Certificate
2003-12-05
2008-11-18
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Measured signal processing
C235S492000
Reexamination Certificate
active
07454318
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.
REFERENCES:
patent: 5416423 (1995-05-01), De Borde
patent: 6695214 (2004-02-01), Leydier et al.
patent: 6917299 (2005-07-01), Fu et al.
patent: 2002/0104052 (2002-08-01), Nolles et al.
patent: 2002/0188852 (2002-12-01), Masaki et al.
patent: 2003/0178974 (2003-09-01), Rozsypal
Bui Bryan
Moffat Jonathan
NXP B.V.
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