Modular Keyless Entry Antenna Layout for Relay Attack Resistance
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Solution Overview
Problem
Existing keyless access systems for transportation vehicles require wireless interfaces at the vehicle door, increasing installation effort and costs due to the need for direct mounting and potential vulnerability to relay station attacks.
Innovation Solution
A modular wireless authentication system with a detachable design, featuring a first section with an antenna for transmitting and receiving radio signals and a second section for mechanical connection, utilizing time-of-flight measurements for secure positioning and authentication, and supporting UWB, Bluetooth, and NFC technologies to enhance reliability and reduce installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless interface is installed at the vehicle door for keyless access, then the user can lock or unlock the vehicle wirelessly, but the installation effort and costs increase
Solution Approach 1:
The authentication system is divided into two separate sections: a first section with an antenna for radio signal transmission/reception, and a second section with control electronics. These sections can be installed at different locations and connected via detachable interfaces, reducing installation complexity while maintaining wireless access functionality
Solution Approach 2:
The modular authentication module can be integrated into different vehicle components (door, hatch, window) and supports multiple wireless communication standards, making it a universal solution that reduces overall system complexity and installation effort across different vehicle configurations
2Ease of operation
If a wireless interface is installed at the vehicle door, then wireless authentication is enabled, but vulnerability to relay station attacks increases
Solution Approach 1:
The patent introduces an intermediary authentication module that mediates between the user's mobile terminal and the vehicle's locking system. This intermediary performs additional verification steps and uses multiple communication channels to detect and prevent relay station attacks, enhancing security while maintaining wireless authentication convenience
Solution Approach 2:
The authentication system implements feedback mechanisms where the control device verifies signal characteristics, response times, and authentication tokens from the mobile terminal. This feedback loop enables the system to detect anomalies indicative of relay station attacks and reject unauthorized access attempts
3Reliability
If multiple radio technologies are integrated, then authentication reliability is enhanced, but device complexity increases
Solution Approach 1:
The patent combines multiple radio technologies (UWB, Bluetooth, NFC) into a single integrated authentication module. The control device manages multiple communication interfaces and protocols within one unit, providing redundant authentication paths that enhance reliability while containing complexity within a modular design that can be installed as a single component
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The modular design reduces installation costs and improves security by enabling secure authentication and positioning, minimizing interference from shielding materials and preventing unauthorized access, while maintaining operational reliability through redundant radio technologies.
Implementation Method 1
a first section (12) having an antenna (14) configured for transmitting and receiving radio signals
Implementation Method 2
utilizing time-of-flight measurements for secure positioning and authentication
Data Source
AI summary
A wireless interface for detecting an authorized access of a user to a keyless access system of a transportation vehicle. The part of the wireless interface provided for the wireless communication is detachably connected to the part of the wireless interface containing the electronics to improve the diversity of installation and mounting of the wireless interface.