Railroad Gateway with Protocol Conversion for Secure Remote Access
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Solution Overview
Problem
Railroad technical systems, particularly signaling systems, face challenges in enabling secure remote access while maintaining high security standards to prevent unauthorized access, as existing VPN tunneling techniques cannot completely rule out malicious access.
Innovation Solution
A gateway with a network adapter, video signal adapter, and conversion facility that establishes secure connections to a railroad technical system network, converting video and device signal data into external network data without direct access, ensuring a protocol break and high security levels, including authentication and audit logging facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If VPN tunneling techniques are used to enable remote access to the railroad technical system network, then remote access capability is improved, but security against malicious access deteriorates
Solution Approach 1:
The patent introduces a gateway as an intermediary device between the railroad technical system network and external networks. The gateway includes a network adapter for external network connection and signal adapters for connecting to railroad technical systems, with a conversion facility that translates between different data formats. This intermediary structure enables remote access while maintaining security boundaries, as the gateway controls and monitors all traffic between the isolated railroad network and external users, preventing direct malicious access to the core system.
Solution Approach 2:
The gateway is divided into distinct functional segments: a network adapter for external network communication, signal adapters for railroad system connection, and a conversion facility for data translation. This segmentation allows each component to perform its specific function with appropriate security measures, enabling remote access capability while maintaining the security isolation of the railroad technical system network.
2Productivity
If direct network access is provided to enable remote maintenance, then maintenance efficiency is improved, but security risks increase
Solution Approach 1:
The gateway serves as a secure intermediary that enables maintenance personnel to access railroad technical systems remotely without direct network connection. The conversion facility translates maintenance commands and data between external network protocols and railroad system protocols, allowing efficient remote maintenance while the gateway's controlled interface prevents unauthorized access to the core railroad network.
Solution Approach 2:
The patent replaces direct mechanical/network connectivity for maintenance purposes with a protocol conversion system. Instead of allowing direct network access, the system uses the gateway's conversion facility to translate and mediate all communication, substituting the direct connection mechanism with a controlled translation layer that maintains security while enabling maintenance operations.
Data Source
AI summary
A gateway for connection to a closed network of a railroad technical system has a network adapter for establishing a network connection to an external network. A video signal adapter can establish a video signal connection to the railroad technical system, and/or a device signal adapter can establish a device signal connection to the railroad technical system. At least one conversion facility is connected to both the network adapter and the video signal transmitter and/or the device signal adapter and converts the video or device signal connection data of the railroad technical system into external network data. The gateway thus provides particularly secure access to the closed network of the railroad technical system. There is also described a method for operating a gateway for connection to a closed network of a railroad technical system.