Vehicle Authorization Code Display for External Device Coupling
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Solution Overview
Problem
Existing methods for authorizing external devices connected to a motor vehicle's data bus require operators to enter two codes, one on the external device and one on the vehicle's authorization device, making the process cumbersome and error-prone, and often necessitate accessing written documentation for the vehicle-side code, which can be inconvenient and insecure.
Innovation Solution
A method where only one code needs to be entered by the operator, with the vehicle-side code being displayed and entered into the external device, allowing for a single input process and eliminating the need for written documentation, using a time-variable code defined on the vehicle side that can be derived from a replacement code or vehicle-specific information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operator enters two codes (one on external device, one on vehicle authorization device) for device authorization, then the authorization process provides security verification, but the operation process becomes cumbersome and error-prone
Solution Approach 1:
The invention extracts the vehicle-side code from the manual input process and displays it automatically on the vehicle's output device. The operator only needs to enter the code displayed on the vehicle into the external device, eliminating one manual input step while maintaining the security verification function through code comparison.
Solution Approach 2:
The vehicle's authorization device automatically generates and displays the code that needs to be entered into the external device. This self-service mechanism eliminates the need for the operator to manually input the vehicle-side code, reducing errors and simplifying the process while maintaining security through automated code comparison.
2Reliability
If the vehicle-side code is stored in written documentation, then the code can be accessed for authorization, but the process becomes time-consuming and the documentation may be lost or compromised
Solution Approach 1:
The invention replaces the mechanical system of written documentation with an electronic display system. The vehicle's output device (such as a display screen) automatically shows the code, eliminating the need for physical documentation. This substitution reduces retrieval time, eliminates the risk of losing documents, and maintains code security through controlled electronic display.
3Adaptability or versatility
If wireless coupling is enabled for external devices outside the vehicle, then connectivity flexibility is improved, but the risk of unauthorized coupling increases
Solution Approach 1:
The invention performs preliminary authorization verification through code comparison before allowing wireless coupling to occur. The system requires the external device to provide a code that matches the displayed vehicle code, and only after successful verification does the system enable wireless connectivity. This preliminary action prevents unauthorized devices from coupling to the vehicle's data bus.
Data Source
AI summary
A method of authorizing external devices that can be optionally connected with a data bus of a motor vehicle is provided. At least a first code can be entered by an operator in an external device that can be connected with the data bus, and is sent by the external device by way of the data bus to an authorization device of the motor vehicle. The first code is compared with a second code by the authorization device and, if the first code corresponds to the second code, the device connected with the data bus is authorized for coupling to the data bus. The second code is defined on the motor vehicle side independently of the external device. The second code, or a replacement code suitable for its determination, is emitted by an output unit in the motor vehicle interior.