Intrusion detection using a capacitance sensitive touchpad
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United States of America Patent
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Nov 29, 2016
Grant Date -
Nov 13, 2008
app pub date -
May 8, 2008
filing date -
May 8, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A capacitance sensitive proximity and touch-sensitive detection device having an XY electrode grid sensor, wherein a compensation matrix is created when the capacitance sensitive touchpad is installed within a PIN Entry Device (PED), wherein the compensation matrix enables the capacitance sensitive touchpad to compensate and be balanced for the operating environment of the PED, and wherein physical keys of a keypad can be also be individually identified as an actuated key by using a unique “key profile” for each key, and wherein the insertion of a foreign conductive and/or dielectric material such as an intruding sensor in proximity of the XY electrode grid sensor of the touchpad will cause an imbalance in the electrodes on the capacitance sensitive proximity and touch-sensitive detection device, thereby alerting detection circuitry that tampering has occurred with the PED.
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