Modular Field Device Security Retrofit for IT Security Upgrades
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Solution Overview
Problem
Existing field devices lack flexibility in adapting to varying IT security levels and require costly replacements to meet new security standards, leading to increased device variants and operational inefficiencies.
Innovation Solution
A retrofitting module with a security module that cooperates with field device electronics to achieve predetermined IT security levels, featuring irreversible connections, cryptographic modules, authentication, and functional units to adapt existing and new devices to different security requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing field devices are replaced to meet new IT security standards, then IT security level is improved, but device complexity and cost increase
Solution Approach 1:
The field device is divided into a base device and a separate security module that can be independently added. The security module contains cryptographic functions, authentication mechanisms, and security protocols, allowing security enhancements without redesigning the entire field device architecture.
Solution Approach 2:
The security module is designed as a universal component that can be integrated with multiple types of field devices through standardized interfaces. This single modular security module provides authentication, encryption, and compliance functions across different device families, reducing the need for device-specific security implementations.
2Reliability
If field devices are replaced to achieve higher IT security levels, then IT security level is improved, but loss of time and productivity decrease
Solution Approach 1:
The security module is pre-configured with security protocols, cryptographic keys, and authentication mechanisms during manufacturing or initial setup. This preliminary configuration allows the module to be quickly integrated into existing field devices without requiring time-consuming security setups or device replacements during operational phases.
3Adaptability or versatility
If multiple device variants are created to meet different security requirements, then adaptability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The field device architecture is segmented into a common base device and optional security modules. This segmentation allows manufacturers to produce standardized base devices in large volumes for cost efficiency, while security modules can be added as needed based on specific application requirements, avoiding the need to manufacture entirely different device variants.
Solution Approach 2:
A universal security module design with standardized interfaces can serve multiple field device types and security level requirements (SL1-SL4). This single modular component provides adaptability across different applications without requiring separate manufacturing lines for each device variant.
Data Source
AI summary
A retrofitting module for a process automation field device comprising field device electronics with at least one communication interface, characterized in that the retrofitting module has a security module, wherein the security module cooperates with the field device electronics such that a predetermined IT security level is achieved.