Mobile Device Authentication Control During Charging
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Solution Overview
Problem
The vehicle electronic key system is vulnerable to relay attacks where unauthorized users can establish communication between the mobile device and the vehicle device using a repeater, leading to potential unauthorized vehicle control, especially when the mobile device is charged at home or in close proximity to the vehicle.
Innovation Solution
The mobile device is configured with a receiving unit, response signal generation unit, transmission unit, charging unit, and charge state determination unit to only respond to the vehicle device when it is not being charged, thereby preventing unauthorized communication and vehicle control during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mobile device continuously responds to authentication requests from the vehicle device, then the ease of operation is improved, but the reliability is worsened due to vulnerability to relay attacks during charging
Solution Approach 1:
The mobile device dynamically adjusts its authentication response behavior based on its charging state. When charging is detected, the device transitions to a non-responsive state for authentication requests. When not charging, it returns to a responsive state. This dynamic adaptation resolves the contradiction by making the system secure during charging while maintaining ease of operation during normal use.
Solution Approach 2:
The charging state determination unit acts as an intermediary that mediates between the authentication request and the response signal generation. It monitors the charging state and controls whether the response signal should be generated, thereby preventing relay attacks during charging while allowing normal authentication when not charging.
2Productivity
If the mobile device responds to all authentication requests, then the productivity is improved, but the object-affected harmful factors worsen due to potential unauthorized vehicle control
Solution Approach 1:
The system applies preliminary anti-action by proactively preventing authentication responses during charging states, before any unauthorized control can occur. The charge state determination unit detects charging conditions in advance and blocks potential relay attack vectors, thereby eliminating the harmful effect while maintaining normal authentication productivity when not charging.
3Ease of operation
If the mobile device maintains continuous communication capability, then the ease of operation is improved, but the object-generated harmful factors worsen due to relay attack vulnerability
Solution Approach 1:
The communication capability of the mobile device is made dynamic rather than continuous. The device automatically adjusts its communication responsiveness based on the charging state detected by the charge state determination unit. This dynamic control eliminates relay attack vulnerability during charging while preserving communication availability during normal operation.
Data Source
AI summary
A mobile device wirelessly communicates with a vehicle device. The mobile device includes a receiving unit, a response signal generation unit, a transmission unit, a charging unit, and a charge state determination unit. The receiving unit receives a response request signal transmitted from the vehicle device. The response signal generation unit generates a response signal in response to the response request signal. The transmission unit transmits the response signal. The charging unit charges a built-in battery with an electric power supplied wirelessly or through wire from a power supply device. The charge state determination unit determines whether the charging unit charges the built-in battery. The mobile device is configured not to transmit the response signal, in a situation where the charge state determination unit determines that the charging unit is charging the built-in battery.