Plant Certificate Revocation Service for Immediate Blocklist Updates
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Solution Overview
Problem
Existing control systems for technical installations are inefficient in revoking certificates, leading to delays and potential misuse, as revocation typically requires manual activation by a user or central body, which is not immediate and can be delayed due to organizational and technical reasons.
Innovation Solution
A computer-implemented revocation service that initiates certificate revocation in an event-controlled and automated manner, monitoring the processing of revocation requests and utilizing a blocklist to ensure immediate and secure revocation, reducing the risk of certificate misuse by maintaining up-to-date information on revoked certificates within the control system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual activation by user or central body is used for certificate revocation, then organizational control is maintained, but revocation delays occur and security efficiency deteriorates
Solution Approach 1:
The control system automatically initiates certificate revocation itself without requiring manual activation by users or central bodies. The system monitors certificate validity periods and autonomously revokes certificates that have expired or should be revoked, eliminating the time loss associated with manual processes while maintaining security through automated validation and revocation procedures
Solution Approach 2:
The system performs preliminary actions by monitoring certificate expiration dates and validity periods in advance. Before certificates expire or before revocation is needed, the system has already identified which certificates require revocation and prepares the revocation process, ensuring immediate action can be taken without delays when revocation becomes necessary
2Productivity
If automated event-controlled revocation is implemented, then revocation speed and efficiency improve, but system complexity increases
Solution Approach 1:
The control system integrates multiple functions into a single automated mechanism: it monitors certificate validity periods, determines which certificates require revocation, initiates revocation automatically, and updates the blocklist. This multi-functional approach improves revocation efficiency while minimizing the need for separate complex systems for each function
Solution Approach 2:
The system implements feedback mechanisms where the control system monitors the status of certificates and the blocklist, automatically adjusting its revocation actions based on the current state. This feedback loop ensures that revocation actions are taken only when necessary and that the system maintains accurate information about which certificates are valid and which are revoked, reducing complexity through intelligent decision-making rather than rigid complex control structures
Data Source
AI summary
A control system for a technical plant, in particular a manufacturing or processing plant, wherein the control system is configured to initiate the issuance and revocation of certificates for components of the technical plant as part of certificate management, where the control system includes a computer-implemented revocation service which is configured to initiate the revocation of certificates in an event-controlled and automated manner.