Walking Detection Authentication System for Relay Attack Prevention
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Solution Overview
Problem
The existing authentication systems for vehicles lack convenience and are vulnerable to relay attacks, where an unauthorized person can gain access by mimicking the authentication of a legitimate user, especially when the user is walking and not in a stationary position.
Innovation Solution
An authentication system that includes a mobile device with an acceleration sensor to determine if the user is walking, which temporarily disables the control of the vehicle's operation until the walking status is confirmed, thereby preventing unauthorized access and enhancing security and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If authentication is performed continuously without walking detection, then convenience is improved, but security against relay attacks deteriorates
Solution Approach 1:
The system performs walking detection processing before completing authentication. The control device determines whether the user is walking based on acceleration signals from the mobile device, and only if the user is not walking does it proceed to approve authentication. This preliminary check prevents relay attacks by ensuring the legitimate user is present and stationary during authentication.
Solution Approach 2:
The walking detection function acts as an intermediary mechanism between the authentication request and the final authentication approval. By introducing this intermediate verification step that checks user movement status, the system mediates between convenience and security, allowing quick authentication when the user is stationary while blocking suspicious authentication attempts during movement.
2Reliability
If walking determination processing is added to authentication, then security is improved, but processing time increases
Solution Approach 1:
The walking detection processing operates continuously or periodically during the authentication process rather than as a separate sequential step. The control device monitors acceleration signals throughout the authentication sequence, allowing it to immediately detect and reject relay attacks without adding significant processing delay. This continuous monitoring approach maintains security while minimizing impact on authentication speed.
3Reliability
If control is disabled during walking detection, then security is improved, but user convenience deteriorates
Solution Approach 1:
The control device dynamically adjusts its response based on the walking detection results. When the user is determined to be walking, the control device disables control operations to prevent unauthorized access. When the user is stationary, normal authentication proceeds without interruption. This dynamic adaptation allows the system to maintain security during suspicious periods while providing seamless user experience during legitimate authentication.
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
This solution effectively reduces the risk of relay attacks by ensuring that the vehicle's operation is only enabled when the user is not walking, thereby improving the overall security and convenience of the authentication process.
Implementation Method 1
an acceleration sensor installed in the mobile device and configured to output an acceleration signal corresponding to acceleration applied to the mobile device
Data Source
AI summary
A mobile device is carried by a person to be authenticated. An acceleration sensor is installed in the mobile device and configured to output an acceleration signal corresponding to acceleration applied to the mobile device. A processing device is configured to execute determination processing for determining whether the person is walking based on the acceleration signal. A control device is configured to control operation of a controlled device based on a result of the determination processing and a result of processing for authenticating, by way of the mobile device, the person as a user of the controlled device. The control of the controlled device based on the authentication processing is disabled from time when the determination processing is initiated by the processing device until when a determination as to whether the person is walking is initially made.