Motor Vehicle Key Bluetooth Link Authentication
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Solution Overview
Problem
Current motor vehicle engine start and vehicle entry systems lack a secure and universal method for unlocking vehicles, especially in scenarios where multiple users need access, such as company fleets or car sharing, and existing security mechanisms provide a lower security level when bypassed by additional electronics.
Innovation Solution
Implementing a Bluetooth link between a motor vehicle key and a mobile radio terminal, with authentication via a server using challenge/response and password challenges, ensuring only authorized users can unlock and start the vehicle by receiving an activation key, thereby enhancing security and allowing multiple users to access vehicles securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additional electronics are used to provide access for multiple users, then ease of operation is improved, but security level deteriorates
Solution Approach 1:
The patent introduces a server as an intermediary between the mobile radio terminal and the vehicle access system. The server authenticates users and manages activation keys, providing a secure centralized authentication mechanism that enables multiple user access without compromising security. The server acts as a trusted mediator that verifies user identities before granting access permissions.
Solution Approach 2:
The patent replaces traditional mechanical key systems with an electronic authentication system using mobile radio terminals and Bluetooth communication. This substitution enables remote authentication and multiple user access while maintaining high security levels through cryptographic challenge-response protocols and server-based verification, eliminating the need for physical key duplication.
2Ease of operation
If Bluetooth link is continuously active for rapid access, then ease of operation is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic activation of the Bluetooth interface in the motor vehicle key, switching between inactive/active states based on detected activation attempts. The Bluetooth link is activated only when needed (upon activation attempts via pulled door handle or Pace/RKE) and remains inactive otherwise, enabling rapid access when required while minimizing energy consumption during normal operation.
Data Source
AI summary
Various embodiments may include systems for unlocking a motor vehicle. For example, an apparatus may include: a motor vehicle key for unlocking a motor vehicle having a remote engine start and/or vehicle entry system. The motor vehicle key comprises a Bluetooth antenna and a motor vehicle communication antenna. A controller of the motor vehicle key is configured to: use the Bluetooth antenna to set up a Bluetooth link to a mobile radio terminal using an activation key stored in a memory of the motor vehicle key; and instruct a motor vehicle controller installed in the motor vehicle to prompt an operation of the motor vehicle.