Rail Wheel Sensor Secure Configuration via Cryptographic Mediator
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Solution Overview
Problem
Current rail vehicle wheel sensors lack robust cybersecurity measures, particularly in configuration and communication, making them vulnerable to unauthorized access and interference, especially in unsecured track infrastructure environments.
Innovation Solution
Incorporating a cryptographic device capable of securely storing a secret key for authentication and authorization, along with a communication converter system for secure communication, and integrating a sensor operation and environment monitoring system with automatic testing, to enhance both communication security and configuration security during production, installation, and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If configuration procedures are simplified for ease of installation, then ease of operation is improved, but cybersecurity is worsened due to potential unauthorized access
Solution Approach 1:
The patent introduces an intermediary authorization system that mediates between the simplified configuration interface and the sensor's internal systems. This intermediary layer verifies credentials and manages access rights, allowing simple configuration procedures while preventing unauthorized access to critical functions.
Solution Approach 2:
The patent implements preliminary authorization verification before allowing configuration access. Credentials are checked and permissions are established in advance, enabling the system to provide easy configuration for authorized users while blocking unauthorized access attempts before they can affect system security.
2Reliability
If cryptographic devices are added for secure communication, then cybersecurity is improved, but device complexity is worsened
Solution Approach 1:
The patent merges the cryptographic device with the existing microprocessor system and integrates security functions into the current communication infrastructure. By combining multiple functions into existing components rather than adding separate dedicated hardware, the system achieves enhanced cybersecurity while minimizing the increase in device complexity.
3Ease of repair
If automatic testing systems are integrated, then maintainability is improved, but device complexity is worsened
Solution Approach 1:
The patent implements a self-service automatic testing system that autonomously performs diagnostics, fault detection, and system verification without requiring external testing equipment or specialized personnel. The system tests itself and reports status automatically, significantly improving maintainability while the integrated nature of the testing functions minimizes the added complexity.
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 solution provides secure communication and configuration for rail vehicle wheel sensors, significantly increasing maintainability and fulfilling cybersecurity requirements, ensuring the integrity of sensor operations and data transfer.
Implementation Method 1
For the purpose of wheel detection, techniques using the magnetic field change during the passage of a wheel are commonly used
Implementation Method 2
one of the basic techniques is a known current loop system which enables transmission over relatively long distances (over 10 km) with high resistance to interference
Data Source
AI summary
According to the invention a rail vehicle wheel sensor assembly (ZCK) is provided that comprises a rail vehicle wheel detection system (UWK) and a two-wire interface in the form of a current loop, by means of which the wheel detection system (UWK) is connected to an external device (SO). The wheel sensor assembly (ZCK) is characterised in that it comprises a wheel detection configuration system (UKDK) connected to the wheel detection system (UWK), an authorisation and configuration system (UA) capable of storing at least one secret (SK), used for secure communication with the external device (SO) and for forwarding configuration commands to the wheel detection configuration system (UKDK) connected thereto, a communication converter system (UM) used for the signal conversion, a wheel sensor supply voltage conversion system (UKU), a voltage summation and voltage-to-sensor-output-current conversion system (UKUI), an output signal permission system (UZSW) and a power supply system (UZ).According to the invention a rail vehicle wheel detection device (DWK) comprising two or more such wheel sensor assemblies is further provided.