Hybrid Vehicle Antitheft System Local Central Authentication
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Solution Overview
Problem
Conventional vehicle antitheft systems, particularly central-type systems, face issues with prolonged authentication times, battery drain due to continuous communication needs, and inability to function in areas without radio coverage, leading to user inconvenience and security vulnerabilities.
Innovation Solution
An in-vehicle antitheft device that permits temporary use of vehicle functions after local authentication, with a central authentication system extending permission based on time or distance traveled, allowing for quick vehicle access while maintaining high security through a hybrid approach combining local and central authentication methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If central-type authentication is used to maintain high security, then security is improved, but authentication time increases significantly
Solution Approach 1:
The authentication process is divided into two independent stages: local authentication (between vehicle and key) and central authentication (between vehicle and central device). The local authentication can complete quickly to permit temporary vehicle use, while central authentication provides enhanced security verification. This segmentation allows the system to achieve both fast access and high security without requiring complete central verification before vehicle operation.
2Reliability
If continuous communication with central device is maintained to prevent theft while parking, then security is improved, but battery consumption increases
Solution Approach 1:
Instead of continuous communication, the system uses periodic or on-demand communication with the central device. The communication module activates only when authentication is needed (vehicle start, door unlock), rather than maintaining constant connection. This periodic action significantly reduces battery consumption during parking while maintaining security through periodic verification.
3Speed
If local authentication is used to reduce authentication time, then authentication speed is improved, but security level decreases
Solution Approach 1:
The authentication system is segmented into local authentication (fast, between vehicle and key) and central authentication (secure, between vehicle and central device). Local authentication using stored key data provides rapid vehicle access, while central authentication provides enhanced security verification. Both layers work together to achieve fast authentication speed without compromising security.
4Use of energy by moving object
If intermittent operation of communication module is used to save battery, then energy consumption is reduced, but authentication time increases
Solution Approach 1:
The system performs preliminary local authentication using stored key data before attempting central authentication. This preliminary action allows the vehicle to be quickly permitted for temporary use without waiting for central device communication. The communication module is activated only when needed for central verification, reducing energy consumption while maintaining fast authentication through the preliminary local verification step.
Data Source
AI summary
An in-vehicle antitheft device and a central authentication device can improve a convenience of use of a user while maintaining a high security, which is a merit of a central-type authentication system. A use of a first group of vehicle functions, which has not been permitted, is permitted when an authentication by an in-vehicle local collation part is completed in agreement. A request signal of requesting a user authentication is transmitted to a central authentication device through a communication line. A use of a second group of vehicle functions, which have note been permitted, is permitted when the user authentication is completed in agreement in the central authentication device.