| 摘要 |
The system and method for detecting duress using a proximity card comprising at least one transponder and a switch. The switch configured to activate with the user's touch. The switch comprising a thermistor, a piezoelectric sensor, an exposed electrode, a capacitive sensor, or the like, which is located on the proximity card. The switch is configured to modify the signal form a first transponder, or activate a second transponder, thereby sending a duress signal. If a duress pattern is recognized, then the system notifies another party of the situation, or sets a system flag.
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