Vehicle Control System Relay Attack Detection
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Solution Overview
Problem
Existing on-vehicle apparatus control systems fail to detect and prevent relay attacks, which allow malicious third parties to unlock vehicles or start engines, as these attacks do not leave traces on the control devices or portable machines, making users unaware of the threat.
Innovation Solution
The system introduces a mode switching unit that selects a permission or prohibition mode, and an illegality recording portion to record and notify illegality, with the portable machine transmitting an illegality notification signal instead of a response signal during a prohibition mode, preventing unauthorized control and recording attack history.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the on-vehicle control device transmits response request signals continuously (polling method), then the vehicle control responsiveness is improved, but the system becomes vulnerable to relay attacks
Solution Approach 1:
The portable machine performs preliminary actions by continuously monitoring for response request signals even when not in active use. This allows the machine to detect relay attack attempts in advance by identifying unexpected response request signals, preventing unauthorized vehicle control before the attack can succeed.
Solution Approach 2:
The system implements feedback mechanisms where the portable machine sends notification signals to the on-vehicle control device when relay attacks are detected. This feedback loop enables the control device to recognize attack patterns and adjust its response, improving security while maintaining legitimate control functionality.
2Measurement precision
If the portable machine continuously monitors for response request signals, then relay attack detection capability is improved, but the power consumption increases
Solution Approach 1:
The portable machine employs periodic monitoring instead of continuous operation. It activates the receiver at specific intervals to check for response request signals, then enters a low-power state between checks. This periodic action maintains relay attack detection capability while significantly reducing overall power consumption compared to continuous monitoring.
3Loss of information
If the on-vehicle control device records all communication interactions, then relay attack traceability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts and isolates the recording function into a dedicated illegality recording portion within the control device. This separate module specifically captures response request signals and communication timing information without requiring complex changes to the main control system, thereby improving traceability while minimizing increases in overall device complexity.
Data Source
AI summary
An on-vehicle apparatus control system includes: an on-vehicle control device; and a portable machine. The on-vehicle apparatus control system includes: a mode switching unit that selects a permission mode or a prohibition mode; and an illegality recording portion that records transmission or reception of a response request signal as illegality history in a case where the response request signal is transmitted from the on-vehicle control device or is received by the portable machine during the prohibition mode. If the response request signal is received by the portable machine during the permission mode, the portable machine transmits the response signal. If the response request signal is received by the portable machine during the prohibition mode, the portable machine transmits an illegality notification signal instead of the response signal, and the on-vehicle control device does not control an on-vehicle apparatus if the illegality notification signal is received.