Method for preventing illegitimate use of chip cards
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United States of America Patent
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-
Apr 11, 2006
Issued Date -
N/A
app pub date -
Nov 21, 2001
filing date -
May 21, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In order to detect attempted interventions in the vicinity of a smart card, a sensor hierarchy is used. Abnormal operating states are first detected by less sensitive sensors that are connected upstream and which then activate sensors which are connected downstream and have a relatively high degree of sensitivity, or increase the sensitivity of sensors connected downstream.
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