Vehicle Portable Device Reauthentication for Theft Prevention
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Solution Overview
Problem
Existing vehicle control systems are vulnerable to theft once unauthorized authentication of a portable device succeeds, as they do not effectively prevent theft after the vehicle has started moving.
Innovation Solution
Implementing a controller that performs authentication of a portable device before vehicle startup and reauthentication after startup, with theft prevention measures such as returning the vehicle to a predetermined geographical position or restricting output when reauthentication fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If authentication is performed only before vehicle startup, then the system is simple and easy to operate, but the vehicle becomes vulnerable to theft after unauthorized authentication succeeds
Solution Approach 1:
The system performs preliminary authentication before vehicle startup to verify the portable device's legitimacy. This preliminary action prevents unauthorized vehicles from starting in the first place, addressing the vulnerability where theft could occur after successful authentication.
Solution Approach 2:
The system implements continuous feedback through reauthentication during vehicle operation. The authentication unit repeatedly verifies the portable device's legitimacy during movement, and the notification unit provides feedback to the user about authentication status, enabling real-time theft prevention.
2Reliability
If reauthentication is performed continuously during vehicle movement, then theft prevention reliability is improved, but the device complexity increases
Solution Approach 1:
Instead of continuous reauthentication, the system performs periodic authentication at predetermined intervals during vehicle movement. This periodic action maintains theft prevention reliability while reducing system complexity and computational burden compared to continuous verification.
Solution Approach 2:
The system performs preliminary authentication before startup and then relies on this initial verification for a period during movement. This preliminary action reduces the need for complex continuous verification systems while maintaining adequate security through periodic checks.
3Reliability
If the vehicle returns to a predetermined location upon reauthentication failure, then theft prevention effectiveness is enhanced, but the loss of time increases
Solution Approach 1:
The notification unit acts as an intermediary between the authentication system and the driver. It provides advance warning of authentication failures and gives the driver an opportunity to correct the issue (e.g., by bringing the portable device closer), potentially avoiding the need for vehicle return and reducing time loss.
Solution Approach 2:
Instead of immediately returning the vehicle upon authentication failure, the system inverts the approach by first notifying the user and allowing correction. Only if correction fails does the vehicle return to the predetermined location, thus minimizing unnecessary time loss while maintaining theft prevention effectiveness.
Data Source
AI summary
A vehicle includes a controller. The controller is configured to perform authentication of a portable device by communication with the portable device when startup of a system of the vehicle is instructed, when the system is off, or when the startup of the system of the vehicle is instructed and the system is off. The controller is configured to perform the startup of the system of the vehicle when the startup of the system of the vehicle is instructed, under a condition that the authentication of the portable device is successful. The controller is configured to perform reauthentication of the portable device when predetermined movement of the vehicle is detected after the startup of the system of the vehicle, and perform theft prevention processing when the reauthentication of the portable device fails.