Vehicular Control Device Anti-Relay Security Logic
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Solution Overview
Problem
Existing electronic key systems are vulnerable to unauthorized access through signal relaying tricks, where a request signal is relayed to an electronic key outside the detection area, allowing unauthorized vehicle operation, and current solutions require a bothersome user process to cancel prohibited vehicle operation.
Innovation Solution
A vehicular control device that transmits a request signal and receives a response signal from an electronic key, determining an abnormal state if the response is not received or verification fails within a first time, and temporarily prohibits vehicle operation until a second time has passed, thereby delaying potential unauthorized access and avoiding user inconvenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the in-vehicle device disables input operation to prevent unauthorized access through signal relaying, then vehicle security is improved, but the user operation becomes bothersome due to manual cancellation process
Solution Approach 1:
The system automatically determines whether to disable or release input operation based on verification results, eliminating the need for manual user intervention. The control device itself performs the service of monitoring verification status and automatically adjusting operation permissions, making the system self-regulating without requiring user action to cancel prohibitions.
Solution Approach 2:
The system continuously monitors verification results from electronic keys and provides feedback to automatically adjust the input operation status. When verification succeeds, the system automatically releases the disabled state; when verification fails repeatedly, it automatically disables input operation. This closed-loop feedback mechanism ensures security while maintaining ease of operation.
2Reliability
If the system disables input operation upon verification failure, then unauthorized access is prevented, but legitimate user access may be blocked due to temporary prohibition
Solution Approach 1:
The system dynamically adjusts the input operation status based on real-time verification results rather than maintaining a fixed disabled state. The control device monitors each verification attempt and automatically transitions between enabled and disabled states, allowing flexible adaptation to current security conditions while permitting legitimate access when verification succeeds.
Solution Approach 2:
The system performs preliminary verification checks before disabling input operation by monitoring multiple verification attempts. Only after a threshold of failed verifications is the input operation disabled, allowing preliminary successful verifications to proceed normally. This preliminary action approach prevents premature disabling that would block legitimate users.
Data Source
AI summary
A vehicular control device includes: a transmitter section that transmits a request signal to an electronic key according to an input operation; a receiver section that receives a response signal from the electronic key; a verification section that performs verification of the electronic key on the basis of the response signal; a determination section that determines that an abnormal state occurs, when the receiver section cannot receive the response signal until a first time or when the receiver section receives the response signal until the first time and the verification section fails in verification based on the response signal, after the transmitter section has transmitted the request signal; and a control section that prohibits, when the determination section determines that an abnormal state occurs, a vehicle operation until a second time passes after the determination, and allows the vehicle operation after the second time has passed.