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Secure credit card with near field communications

  • US 7,128,274 B2
  • Filed: 03/24/2005
  • Issued: 10/31/2006
  • Est. Priority Date: 03/24/2005
  • Status: Active Grant
First Claim
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1. A secure card comprising:

  • a card body which incorporates a microprocessor device, a read only memory device and a secure linear feedback shift register, the microprocessor device being interfaced to the read only memory device containing a pre-initialized personality configuration, said pre-initialized personality configuration being comprised of both a unique card identification and a customized secure linear feedback shift register initial configuration;

    a reference linear feedback shift register incorporated in said card body and synchronized to the secure linear feedback shift register;

    a security code generator incorporated in said card body and producing a security code utilizing said secure linear feedback shift register, said secure linear feedback shift register being driven by a common free-running clock oscillator and providing outputs which, when combined with the card identification, produce a security code uniquely based upon said pre-initialized personality configuration, said security code being accessible by the microprocessor; and

    a communication interface incorporated in said card body and connected to said microprocessor device, said communication device providing an input/output message function of secured information including said security code between the microprocessor and an agent outside said secure card body, said communication interface further including a near field communication device for transmitting information by inductive electromagnetic coupling over a range of ten inches at a radio frequency and automatic peer-to-peer network setup without requiring establishment of device configuration and which can be set to an active or passive mode.

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