Secure credit card
First Claim
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 and said reference linear feedback shift register, said secure linear feedback shift register and said reference 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 the secured information between the microprocessor and an agent outside the secure card body.
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Accused Products
Abstract
Credit card or portable identification cards containing smart card technology and electronic fuse (e-fuse) technology are combined with an LFSR pseudo random number generator to provide a secured method to prevent fraud and unauthorized use. Secure personalization via e-fuses, a pseudo-random number generator linear feedback shift register, free running clock oscillator, and power source embedded in the card provide a highly secured method to render a lost or stolen card useless. A unique card ID is permanently encoded within the card which requires a specific activation code to activate the card. A PIN number permits the card owner to activate the card for a predetermined length of time while processing a transaction. The card dynamically generates random code sequences and synchronization keys to secure a transaction.
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Citations
11 Claims
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1. A secure card comprising:
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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 and said reference linear feedback shift register, said secure linear feedback shift register and said reference 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 the secured information between the microprocessor and an agent outside the secure card body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification