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Financial and similar identification cards read by magnetic swipe card readers and methods relating thereto

  • US 7,451,923 B2
  • Filed: 03/06/2007
  • Issued: 11/18/2008
  • Est. Priority Date: 08/12/2004
  • Status: Expired due to Fees
First Claim
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1. An apparatus forming a portable identification card which can be read using a magnetic swipe card reader, comprising:

  • a magnetic stripe for storing information;

    an input device adapted for a user to enter authentication data;

    a memory for storing reference data;

    a processor configured to compare the authentication data entered by the user to the reference data stored in the memory to determine whether the authentication data entered by the user is correct authentication data;

    a sensor assembly configured to detect when the card is swiped through the magnetic card reader;

    a jammer adapted to emit a jamming signal in response to detecting that the card is being swiped without first entering the correct authentication data, wherein the signal causes the magnetic card reader to consider the magnetic stripe to be invalid;

    a power source adapted to supply power to the processor, the sensor assembly, and the jammer;

    wherein the processor is further configured to count sequential entries in which the authentication data entered by the user failed to match the reference data, and wherein the jammer is further adapted to emit an erasing signal which erases a portion of the magnetic stripe when the count of sequential entries exceeds a predetermined number.

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