Moveable Barrier Operator Security with Dynamic Protocol Switching
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Solution Overview
Problem
Existing security systems for moveable barrier operators, such as garage door operators, face challenges in providing enhanced security against unauthorized access and the potential for code interception, particularly with rolling code systems that require physical possession of a pre-trained transmitter for pairing and may fail when multiple controllers are used.
Innovation Solution
A bidirectional communication system that uses encrypted messages with fixed and changing codes, allowing devices to validate transactions and adjust communication protocols dynamically, enabling secure pairing and operation without the need for physical possession of a pre-trained transmitter and accommodating multiple controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rolling code systems are used to prevent code interception, then security against unauthorized access is improved, but the system fails when multiple controllers are used and requires physical possession of pre-trained transmitters for pairing
Solution Approach 1:
The patent implements dynamic code validation where the barrier operator adapts its security protocol based on the controller type. For bidirectional controllers, the system dynamically switches to a challenge-response authentication mechanism that allows multiple controllers without requiring pre-training, while maintaining rolling code security for unidirectional controllers.
Solution Approach 2:
The system changes the authentication parameters based on controller capabilities. When a bidirectional controller is detected, the system transitions from strict rolling code verification to a more flexible challenge-response protocol, allowing the same system to support both security modes depending on the connected device.
2Reliability
If bidirectional communication with encrypted messages is implemented, then security is enhanced and multiple controllers are accommodated, but communication complexity and protocol management increase
Solution Approach 1:
The patent introduces a protocol abstraction layer that mediates between the complex bidirectional encrypted communication and the simple user interface. This intermediary layer handles the encryption, decryption, and protocol switching automatically, shielding users from the underlying complexity while maintaining enhanced security.
Solution Approach 2:
The system performs self-configuration and protocol selection automatically. When a controller is connected, the barrier operator autonomously determines the appropriate communication protocol, establishes encryption parameters, and manages the authentication process without requiring user intervention or configuration.
3Reliability
If traditional rolling code systems are used, then security is provided, but memory requirements increase to store unique sequences of changing code values for each controller
Solution Approach 1:
The patent extracts the controller identification information from the code sequence storage requirement. Instead of storing complete rolling code sequences for each controller, the system only stores unique identifier parameters that allow it to generate or validate codes on-demand, dramatically reducing memory requirements while maintaining security validation.
Solution Approach 2:
The system performs preliminary registration of controller identifiers during the pairing process. By pre-storing only the essential identification parameters rather than complete code sequences, the system prepares for future authentication operations with minimal memory usage, enabling efficient code validation without storing extensive code libraries.
Data Source
AI summary
Systems are provided for secure actuation of a device such as a movable barrier operator. The systems permit the device to instruct a control device associated with the device how to proceed in order to allow different types of security protocols depending on the configuration of the control device. Methods of pairing devices are also provided.