Steer-by-Wire Startup Interlock Against Spoofed Control Signals
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Solution Overview
Problem
Steer-by-wire type steering devices lack effective crime prevention measures against potential malfeasance, such as spoofing, which can compromise vehicle control and safety.
Innovation Solution
A steering control device with a control circuit that verifies information exchange with the vehicle control device and only permits powertrain operation when conditions are met, including completion of preparation processes and vehicle readiness, thereby enhancing crime prevention and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control circuit requests the vehicle control device to stop operation of the powertrain when information exchange does not follow a preset pattern, then crime prevention performance is enhanced, but false stopping may occur due to faked information or improper timing
Solution Approach 1:
The control circuit performs preliminary verification by checking whether the vehicle is in a state capable of traveling before requesting the powertrain to stop. This preliminary action prevents false stopping by ensuring the stop request is only issued when genuinely necessary, while still maintaining crime prevention performance through information exchange pattern verification.
2Reliability
If the control circuit verifies information exchange patterns to prevent unauthorized operation, then security is improved, but system complexity increases
Solution Approach 1:
The control circuit implements feedback by continuously monitoring information exchange patterns between itself and the vehicle control device. When the information exchange does not follow the preset pattern, the control circuit triggers a stop request. This feedback mechanism provides simple yet effective security verification without requiring complex additional hardware or algorithms.
3Ease of operation
If the vehicle control device starts up the powertrain without permission by the control circuit when the remote function is turned on, then convenience is improved, but unauthorized operation risk increases
Solution Approach 1:
The system dynamically adjusts its security behavior based on the operational context. When the remote function is turned on and the vehicle is determined to be in a non-traveling state, the control circuit permits powertrain startup without following the preset information exchange pattern. This dynamic adaptation maintains convenience for remote operations while still preventing unauthorized operation in traveling-capable states.
Data Source
AI summary
A steering control device includes a control circuit that controls driving of a reaction force motor that generates steering reaction force that is given to a steering wheel, dynamic power transmission being not performed between the steering wheel and a turning wheel of a vehicle. The control circuit requests a vehicle control device to stop operation of a powertrain in a case where a vehicle electric power source has been turned on and where exchange of information has been performed with the vehicle control device so as not to follow a preset pattern. The vehicle control device controls traveling of the vehicle. The powertrain includes a traveling drive source of the vehicle.