NEAR-FIELD COMMUNICATION (NFC) SYSTEM AND METHOD FOR PRIVATE NEAR-FIELD COMMUNICATION
First Claim
1. A near-field communication (NFC) system comprising an NFC receiver to receive data privately from an NFC transmitter through a resonance-coupled channel, the NFC receiver comprising:
- a channel-masking signal generator to scramble a reference signal and generate a channel-masking signal for application to the resonance-coupled channel;
a scaling element to scale the channel-masking signal based, at least in part, on near-field channel conditions; and
unmasking circuitry to combine the scaled channel-masking signal with resonance-coupled signals received through the resonance-coupled channel to generate binary data as an output comprising unmasked bits.
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Accused Products
Abstract
Embodiments of a near-field communication (NFC) system and method for private near-field communication are generally described herein. In some embodiments, a resonance-coupled channel is masked with a random channel-masking signal. The channel-masking signal may be scaled based on near-field channel conditions. Signals received through the channel may be unmasked with the scaled channel-masking signal to determine data that may have been conveyed by an NFC transmitting device by affecting the impedance of the resonance-coupled channel. In some embodiments, a reference signal may be scrambled with a mask to generate the channel-masking signal. The mask may include at least one of a random symbol mask, an amplitude mask and a phase mask. For additional privacy, the mask may include a random symbol mask and at least one of an amplitude mask and a phase mask.
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Citations
18 Claims
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1. A near-field communication (NFC) system comprising an NFC receiver to receive data privately from an NFC transmitter through a resonance-coupled channel, the NFC receiver comprising:
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a channel-masking signal generator to scramble a reference signal and generate a channel-masking signal for application to the resonance-coupled channel; a scaling element to scale the channel-masking signal based, at least in part, on near-field channel conditions; and unmasking circuitry to combine the scaled channel-masking signal with resonance-coupled signals received through the resonance-coupled channel to generate binary data as an output comprising unmasked bits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for private communication through a resonance-coupled channel, the method comprising:
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masking the resonance-coupled channel with a random channel-masking signal; scaling the channel-masking signal based on near-field channel conditions; and unmasking signals received through the resonance-coupled channel with the scaled channel-masking signal to determine data, the data conveyed by a transmitting device by affecting an impedance of the resonance-coupled channel. - View Dependent Claims (13, 14, 15)
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16. A method for secure key exchange between devices using near-field communication, the method comprising:
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masking, by a first near-field communication (NFC) device, a resonance-coupled channel with a random channel-masking signal; scaling, by the first NFC device, the channel-masking signal based on near-field channel conditions; and unmasking signals received through the resonance-coupled channel by the first NFC device with the scaled channel-masking signal to determine a key conveyed to a second NFC device by affecting an impedance of the resonance-coupled channel based on binary values of the key.
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17. A system for secure financial transactions between near-field communication (NFC) devices, the system comprising an NFC transmitter and an NFC receiver to receive financial data from the NFC transmitter through a resonance-coupled channel when positioned within a near-field of the NFC transmitter, the NFC receiver comprising:
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a channel-masking signal generator to scramble a reference signal and generate a channel-masking signal for modulating the resonance-coupled channel; a scaling element to scale the channel-masking signal based on near-field channel conditions; and unmasking circuitry to combine the scaled channel-masking signal with signals received through the resonance-coupled channel to generate binary data as an output comprising unmasked bits, wherein the NFC transmitter is to affect an impedance of the resonance-coupled channel based on values of the financial data to be conveyed to the NFC receiver. - View Dependent Claims (18)
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Specification