Back to results
US 12,647,782 B2Granted
Security system for a moveable barrier operator
AssigneeThe Chamberlain Group, Inc.
InventorJames J. Fitzgibbon
Life of this patent
Estimating the term…
Abstract
Electronic systems are provided for secure actuation of a remote device such as a moveable barrier operator. The systems address the “man in the middle” problem of persons intercepting and duplicating radio frequency signals from a control device by introducing timing parameters into a bidirectional communication sequence between at least two devices.
Claims20
A method of performing a pairing operation, the method comprising:
- transmitting, by a first device, a first encrypted message to a second device while the second device is in a learn mode;
- in response to transmitting the first encrypted message, receiving, at the first device, a second encrypted message from the second device comprising a second fixed code associated with the second device;
- storing, by the first device, the second fixed code in a memory of the first device;
- transmitting, by the first device, a third encrypted message to the second device;
- in response to transmitting the third encrypted message, receiving, at the first device, a fourth encrypted message from the second device, the fourth encrypted message comprising the second fixed code;
- validating, by the first device, the fourth encrypted message by confirming that the second fixed code from the second encrypted message matches the second fixed code from the fourth encrypted message;
- and
- based on validating the fourth encrypted message, confirming the pairing of the first device with the second device.
5 more elements
A method of performing a pairing operation, the method comprising:
- receiving, by a second device while the second device is in a learn mode, a first encrypted message from a first device comprising a first fixed code and a first changing code;
- storing, by the second device, the first fixed code and the first changing code to a memory of the second device;
- transmitting, by the second device, a second encrypted message to the first device;
- in response to transmitting the second encrypted message, receiving, by the second device, a third encrypted message comprising the first fixed code and a changed version of the first changing code;
- validating, by the second device, the third encrypted message by comparing the first fixed code and the changed version of the first changing code of the third encrypted message with the first fixed code and the first changing code of the first encrypted message;
- and
- based on validating the third encrypted message, transmitting, by the second device, a fourth encrypted message from the second device to the first device.
4 more elements
A method of performing a pairing operation, the method comprising:
- transmitting, by a first device, a first encrypted message to a second device while the second device is in a learn mode;
- in response to receiving the first encrypted message, transmitting, by the second device a second encrypted message comprising a second fixed code associated with the second device;
- in response to receiving the second encrypted message, transmitting, by the first device, a third encrypted message to the second device;
- in response to receiving the third encrypted message, transmitting, by the second device, a fourth encrypted message comprising the second fixed code;
- in response to receiving the fourth encrypted message, validating, by the first device, the fourth encrypted message by confirming that the second fixed code from the second encrypted message matches the second fixed code from the fourth encrypted message;
- and
- based on validating the fourth encrypted message, confirming the pairing of the first device with the second device.
4 more elements
Dependencies are inferred from the claim text.