Method of securing volumes of space in card readers
First Claim
1. A method for performing intrusion detection on a card reader by comparing intrusion detection measurements, said method comprising:
- providing a card reader assembly in a housing, the card reader assembly including a card slot for receiving a card to be read;
providing a capacitive sensor module for detecting changes in capacitance on intrusion detection electrodes, wherein the intrusion detection electrodes are disposed adjacent to the card slot and coupled to the capacitive sensor module and dedicated to detection of conductive or dielectric objects that cause an imbalance of electrical charges on at least one of the intrusion detection electrodes;
creating an intrusion detection matrix by transmitting at least one signal pattern from the intrusion detection electrodes, receiving at least one response on the intrusion detection electrodes, and storing the at least one response in the intrusion detection matrix to show an initial imbalance of electrical charges on the intrusion detection electrodes, the intrusion detection matrix being stored in non-volatile memory that is not erased when the card reader is shut off;
performing an intrusion detection procedure by transmitting the at least one signal pattern from the intrusion detection electrodes, receiving at least one new response on the intrusion detection electrodes and comparing the at least one new response to the initial imbalance of electrical charges stored in the intrusion detection matrix stored in the non-volatile memory to determine if an object has caused a change in capacitance on the intrusion detection electrodes; and
performing an action if it is determined that the at least one new response is different from the initial imbalance stored in the intrusion detection matrix, the action being selected from the group of actions comprised of taking no action and letting the card reader to continue operating but sending an alert signal, shutting down the card reader, or a combination of these actions.
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Accused Products
Abstract
Capacitive sensing electrodes may be placed in strategic locations inside, outside or inside and outside of a card reader, wherein touch sensor circuitry is then used to take mutual capacitance or self-capacitance measurements that are saved in non-volatile memory as a reference intrusion measurement that is not deleted when power is removed, wherein the reference intrusion measurement may then be used during subsequent intrusion measurements to determine if a skimming device has been disposed adjacent to the card reader, and if a skimming device is detected, appropriate action may be taken such as the automatic disabling of the card reader, the display of a message indicating that the card reader should not be used, or any other action that may prevent a financial card from being compromised.
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Citations
8 Claims
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1. A method for performing intrusion detection on a card reader by comparing intrusion detection measurements, said method comprising:
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providing a card reader assembly in a housing, the card reader assembly including a card slot for receiving a card to be read; providing a capacitive sensor module for detecting changes in capacitance on intrusion detection electrodes, wherein the intrusion detection electrodes are disposed adjacent to the card slot and coupled to the capacitive sensor module and dedicated to detection of conductive or dielectric objects that cause an imbalance of electrical charges on at least one of the intrusion detection electrodes; creating an intrusion detection matrix by transmitting at least one signal pattern from the intrusion detection electrodes, receiving at least one response on the intrusion detection electrodes, and storing the at least one response in the intrusion detection matrix to show an initial imbalance of electrical charges on the intrusion detection electrodes, the intrusion detection matrix being stored in non-volatile memory that is not erased when the card reader is shut off; performing an intrusion detection procedure by transmitting the at least one signal pattern from the intrusion detection electrodes, receiving at least one new response on the intrusion detection electrodes and comparing the at least one new response to the initial imbalance of electrical charges stored in the intrusion detection matrix stored in the non-volatile memory to determine if an object has caused a change in capacitance on the intrusion detection electrodes; and performing an action if it is determined that the at least one new response is different from the initial imbalance stored in the intrusion detection matrix, the action being selected from the group of actions comprised of taking no action and letting the card reader to continue operating but sending an alert signal, shutting down the card reader, or a combination of these actions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification