Apparatus for prevention of reading of magnetic cards
First Claim
1. A card reading machine comprising:
- a card reader for reading data on a magnetic card; and
a device for preventing reading of the data on the magnetic card by an illegal card reading devices operatively associated with the card reading machine,wherein the device for preventing reading comprises a coil for generating signals when the magnetic card is passed along the illegal card reading device, the signals being so similar in frequency range to signals generated by the magnetic card being passed along the illegal card reading device, that coil generated signals and signals generated by the magnetic card being passed along the illegal card reading device create combined signals from which the coil generated and the passing of the magnetic card generated signals cannot in practice be filtered from each other.
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Accused Products
Abstract
A card reading machine includes a card reader for reading data on a magnetic card and a device for preventing reading of the data on the magnetic card by illegal card reading devices operatively associated with the card reading machine. The device for preventing may include an oscillator, a driver circuit and a coil for generating electromagnetic signals similar to data on a card. A method for preventing reading of data on a magnetic card by in illegal card reader in operative association with an apparatus having a card reader intended to read the data on the magnetic card includes producing a signal ruining the data collected by the illegal card reader. The apparatus having a card reader may include an insertion slot in which case the method may further include producing the signal near the insertion slot.
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Citations
20 Claims
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1. A card reading machine comprising:
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a card reader for reading data on a magnetic card; and a device for preventing reading of the data on the magnetic card by an illegal card reading devices operatively associated with the card reading machine, wherein the device for preventing reading comprises a coil for generating signals when the magnetic card is passed along the illegal card reading device, the signals being so similar in frequency range to signals generated by the magnetic card being passed along the illegal card reading device, that coil generated signals and signals generated by the magnetic card being passed along the illegal card reading device create combined signals from which the coil generated and the passing of the magnetic card generated signals cannot in practice be filtered from each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. A device for preventing reading of data on a magnetic card by an illegal card reading device at a card reading machine, the device comprising means for providing an electromagnetic field ruining the data obtained by the illegal card reader, wherein the means for providing the electromagnetic field comprises a coil for generating signals so similar in frequency range to signals generated by the magnetic card being passed along the illegal card reading device that coil generated signals and signals generated by the magnetic card being passed along the illegal card reading device create combined signals from which the coil generated and the passing of the magnetic card generated signals cannot in practice be filtered from each other.
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18. A method of preventing reading of data on a magnetic card by an illegal card reader in operative association with an apparatus having a card reader intended to read the data on the magnetic card, the method comprising:
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producing a signal ruining the data collected by the illegal card reader, wherein the signal so similar in frequency range to signals generated by the magnetic card being passed along the illegal card reading device that coil generated signals and signals generated by the magnetic card being passed along the illegal card reading device create combined signals from which the coil generated and the passing of the magnetic card generated signals cannot in practice be filtered from each other. - View Dependent Claims (19, 20)
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Specification