Blockchain Railway Key Management Automation

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Solution Overview

Problem

The current management of railway cryptographic keys is complex and time-consuming, often resulting in extended key validity periods due to the need for manual procedures and physical handling, which compromises security and efficiency in railway communication networks.

Innovation Solution

A blockchain-based system and method for generating, managing, and distributing railway keys, where computing devices within a blockchain network automatically acquire and validate key generation rules, generate transactions for key creation, update, or deletion, and communicate these transactions to Key Management Centers, ensuring secure and automated key management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual procedures and physical handling are used for key management, then security personnel can control key distribution, but the process becomes complex and time-consuming

Engineering Contradiction:

Improvesecurity controlVSAvoidkey management process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical procedures with an automated electronic system. Blockchain nodes automatically generate, validate, and distribute cryptographic keys through consensus mechanisms, eliminating the need for physical key transmission and manual safety personnel intervention. The system uses digital signatures and cryptographic protocols to ensure security without human handling.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The blockchain network performs self-service key management through autonomous nodes that automatically validate transactions, generate keys according to predefined rules, and distribute them to authorized devices. The consensus mechanism enables the system to self-regulate and maintain security without external manual control.

Inventive Principle:

Principle #25Self-service

2Reliability

If manual key replacement procedures are used, then security can be maintained through human oversight, but the key validity period must be extended indefinitely to avoid renewal

Engineering Contradiction:

ImprovesecurityVSAvoidkey validity period

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The blockchain system implements automatic periodic key renewal through scheduled transactions. Nodes continuously monitor key validity periods and automatically generate replacement keys before expiration, ensuring continuous security without manual intervention. The consensus mechanism validates each renewal transaction, maintaining security while preventing indefinite key usage.

Inventive Principle:

Principle #19Periodic action

3Productivity

If automated blockchain system is used for key management, then efficiency and speed are improved, but the system complexity increases

Engineering Contradiction:

Improvekey management efficiencyVSAvoidblockchain system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The blockchain key management system is segmented into specialized nodes with specific functions: some nodes generate keys, others validate transactions, and others distribute keys. This segmentation allows parallel processing of key management tasks, improving efficiency while distributing complexity across multiple independent components rather than requiring one complex centralized system.

Inventive Principle:

Principle #1Segmentation

4Reliability

If physical transmission of keys is used, then confidentiality requirements are satisfied through controlled handling, but the process becomes time-consuming and labor-intensive

Engineering Contradiction:

ImproveconfidentialityVSAvoidkey transmission time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces physical key transmission with cryptographic key exchange protocols implemented through the blockchain network. Keys are transmitted electronically as encrypted data packets, with confidentiality ensured through cryptographic algorithms and secure communication channels rather than physical security measures. This eliminates travel time and manual handling while maintaining or enhancing confidentiality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3879749A1Method and system for automatically generating and managing railway keys

Publication Date: 2021.09.15 SIEMENS RAIL AUTOMATION

Figure 1~2

AI summary

The present invention concerns a method and system for generating and managing railway keys for one or several railway operators, wherein said railway keys are used for authenticating communications between devices within a railway network (21, 22, 23) of the railway operator, the system comprising: - a blockchain network (1) configured for acquiring an operator key generation rule for a railway operator and for automatically generating for at least one of said two devices of the railway network (21, 22, 23) a transaction for a railway key from the acquired operator key generation rule, wherein said blockchain network (1) is further configured for validating each of the generated transactions and for writing onto a blockchain of the blockchain network (1) each validated transaction; - a dispatch system (16) of the blockchain network (1) configured for automatically communicating each transaction that has been written onto the blockchain to at least one device, preferentially to a Key Management Center - hereafter KMC - (211, 221, 231), of the railway network (21, 22, 23) of the railway operator for which the transaction has been generated.