Id-based control unit-key fob pairing
AssigneeTexas Instruments Incorporated
InventorsJin-Meng HO, Eric PEETERS
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Abstract
A method for pairing a key fob with a control unit is provided. The key fob executes an ID authenticated key agreement protocol with a pairing device based on a key fob identification to authenticate one another and to generate a first encryption key. The pairing device encrypts a control unit identification using the first encryption key. The key fob receives the encrypted control unit identification transmitted from the pairing device. The key fob then executes an ID authenticated key agreement protocol with the control unit based on the control unit identification to authenticate one another and to generate a second encryption key. The key fob then receives an operational key transmitted from the control unit that is encrypted with the second encryption key.
Claims20
A method comprising:
- obtaining, by a first device, a first identification key associated with an identifier of the first device;
- receiving, by the first device, a first encryption key encrypted using the first identification key, the first identification key associated with a second device;
- obtaining, by the first device, a second identification key based on the first encryption key;
- receiving, by the first device, a first operational key encrypted using the second identification key;
- and
- after receiving the first operational key, erasing the first encryption key from the first device.
An electronic device comprising:
- a memory;
- a transceiver;
- and
- a processor configurable to:
- obtain a first identification key associated with an identifier of the electronic device;
- receive, via the transceiver, a first encryption key encrypted using the first identification key, the first encryption key associated with another device;
- obtain a second identification key based on the first encryption key;
- receive, via the transceiver, a first operational key encrypted using the second identification key;
- and
- after receiving the first operational key, erase the first encryption key from the memory.
A method comprising:
- obtaining a first identification key associated with an identifier of a device;
- receiving a first encryption key encrypted using the first identification key, the first identification key associated with a second device
- obtaining a second identification key based on the first encryption key;
- receiving a first operational key encrypted using the second identification key;
- and
- after receiving the first operational key, erasing the first encryption key from the device.
Dependencies are inferred from the claim text.