Near field telemetry link for passing a shared secret to establish a secure radio frequency communication link in a physiological condition management system
First Claim
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1. A method for pairing first and second wireless devices in a physiological condition management system, comprising;
- placing the first wireless device in proximity with the second wireless device;
generating an indication that the first and second wireless devices are in proximity with each other to establish communication via a near field communication (NFC) link, the first and second wireless devices comprising the first wireless device and the second wireless device placed in proximity of each other;
generating a secret key at the first wireless device using a random process and sharing the secret key with the second wireless device via the NFC link in response to the indication that the first and second wireless devices are in proximity with each other to establish the communication via the NFC link; and
transmitting signals between the first and second wireless devices via a secure radio frequency (RF) link that is different from the NFC link and on which the signals are encrypted using the secret key;
wherein the secret key is not generated until after the first and second wireless devices are placed proximally to each other to establish the NFC link.
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Abstract
Pairing is provided between first and second wireless devices in a physiological condition management system. The first and second wireless devices are placed in proximity to initiate generation of a secret key via a random process at one of the devices and to exchange the secret key with the other device using a wireless near field communication (NFC) link. The shared secret key is then used to encrypt data for communication between the first and second wireless devices via a different secure radio frequency (RF) wireless channel.
21 Citations
21 Claims
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1. A method for pairing first and second wireless devices in a physiological condition management system, comprising;
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placing the first wireless device in proximity with the second wireless device; generating an indication that the first and second wireless devices are in proximity with each other to establish communication via a near field communication (NFC) link, the first and second wireless devices comprising the first wireless device and the second wireless device placed in proximity of each other; generating a secret key at the first wireless device using a random process and sharing the secret key with the second wireless device via the NFC link in response to the indication that the first and second wireless devices are in proximity with each other to establish the communication via the NFC link; and transmitting signals between the first and second wireless devices via a secure radio frequency (RF) link that is different from the NFC link and on which the signals are encrypted using the secret key; wherein the secret key is not generated until after the first and second wireless devices are placed proximally to each other to establish the NFC link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A physiological condition management system, comprising:
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first and second wireless devices configured to perform physiological condition management operations, at least one of the first and second wireless devices being configured to generate an indication when the first and second wireless devices are in proximity with each other and have established communication via a near field communication (NFC) link; the first wireless device being configured to generate a secret key using a random process and share the secret key with the second wireless device via the NFC link in response to the indication that the first and second wireless devices are in proximity with each other to establish the communication via the NFC link; and the first and second wireless devices being configured to transfer data via a secure radio frequency (RF) link that is different from the NFC link and on which the data is encrypted using the secret key by the at least one of the first and second wireless devices, and at least other one of the first and second wireless devices being configured to decrypt the data using the secret key; wherein the secret key is not generated until after the first and second wireless devices are placed proximally to each other to establish the NFC link. - View Dependent Claims (16)
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- 13. The physiological condition management system of daim 12, wherein the at least one of the first and second wireless devices comprises a first inductive element adapted to provide an inductive link between the first inductive element and a second inductive element in the other one of the first and second wireless devices.
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17. A first wireless device securely paired with a second wireless device in a physiological condition management system, the first wireless device comprising:
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a controller configured to perform a physiological condition management operation; and at least one wireless communication interface for transmitting physiological condition management signals to and from the second wireless device; wherein the controller is configured to generate a secret key using a random process and share the secret key with the second wireless device via the at least one wireless communication interface via a near field communication (NFC) link in response to an indication that the first and second wireless devices are in proximity with each other to establish communication via the NFC link, and to transmit the physiological condition management signals to the second wireless device using a secure radio frequency (RF) link that is different from the NFC link based on the secret key, the first wireless device encrypting the physiological condition management signals using the secret key; wherein the secret key is not generated until after the first wireless device and the second wireless device are placed proximally to each other. - View Dependent Claims (18, 19, 20, 21)
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Specification