System and method for securing short-distance wireless communications, and applications thereof
First Claim
1. A system for short-distance wireless communications within a communication space, comprising:
- a first wireless communication device having a locator; and
a second wireless communication device that communicates with the first wireless communication device,wherein the locator of the first wireless communication device analyzes first signals received via a plurality of radio frequency paths from the second wireless communication device to determine a spatial location within the communication space for the second wireless communication device, andwherein the first wireless communication device transmits a key by second signals that arrive via a plurality of radio frequency paths substantially in-phase at the spatial location determined by the locator and substantially out-of-phase at other locations within the communication space, thereby allowing the key to be received by the second wireless communication device.
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Accused Products
Abstract
A first portable wireless communication device enters a PICONET and establishes unencrypted communications with a second wireless communication device, the PICONET master. The first portable wireless communication device transmits identification information to the second wireless communication device using a conventional short-distance communications protocol. The second wireless communication device transmits, in a novel FEMTONET communications mode, an encryption key to the first portable wireless communication device. The first portable wireless communication device then securely transmits encrypted messages based on the encryption key to the second wireless communication device using the conventional short-distance communications protocol.
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Citations
17 Claims
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1. A system for short-distance wireless communications within a communication space, comprising:
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a first wireless communication device having a locator; and a second wireless communication device that communicates with the first wireless communication device, wherein the locator of the first wireless communication device analyzes first signals received via a plurality of radio frequency paths from the second wireless communication device to determine a spatial location within the communication space for the second wireless communication device, and wherein the first wireless communication device transmits a key by second signals that arrive via a plurality of radio frequency paths substantially in-phase at the spatial location determined by the locator and substantially out-of-phase at other locations within the communication space, thereby allowing the key to be received by the second wireless communication device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for establishing secure short-distance communications, comprising:
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(a) establishing unencrypted PICONET mode communications between a first wireless communication device and a second wireless communication device; (b) transmitting in FEMTONET communications mode an encryption key from the first wireless communication device to the second wireless communication device; and (c) transmitting in PICONET communications mode an encrypted message based on the encryption key from the second wireless communication device to the first wireless communication device. - View Dependent Claims (12, 13, 14, 15)
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16. A system for short-distance wireless communications, comprising:
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a first wireless communication device that selectively operates in one of a PICONET communications mode and a FEMTONET communications mode; and a second wireless communication device that communicates with the first wireless communication device in PICONET communications mode, wherein the first wireless communication device transmits in FEMTONET communications mode an encryption key to the second wireless communication device, thereby enabling the second wireless communication device to send in PICONET communications mode encrypted messages based on the encryption key to the first wireless communication device. - View Dependent Claims (17)
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Specification