Integrated File Security for Substrate Processing Apparatus
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Solution Overview
Problem
The reliability and security of substrate processing apparatuses are compromised when unauthorized personnel edit process recipes, particularly due to the lack of permissions and encryption in integrated files containing gas flow pattern diagrams, which can lead to tampering and unauthorized modifications.
Innovation Solution
A processing apparatus configuration that includes an operating unit for displaying non-encrypted and encrypted data, a memory unit for storing the integrated file, and an arithmetic unit to compare and decrypt encrypted data, ensuring only authorized personnel can modify and view the integrated file by performing authentication and data integrity checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the integrated file containing gas flow pattern diagrams is made editable without restrictions, then the ease of operation and editing is improved, but the security and reliability of the substrate processing apparatus deteriorates due to unauthorized personnel being able to tamper with the recipe
Solution Approach 1:
The integrated file is divided into multiple item files, each representing a specific process step or parameter. This segmentation allows the system to manage and protect different portions of the recipe independently, enabling fine-grained access control where authorized personnel can edit specific items while maintaining overall security of the complete process recipe.
Solution Approach 2:
Different permission levels and encryption schemes are applied to different item files within the integrated file. Critical process parameters may have stricter access controls and encryption compared to less sensitive information, allowing the system to balance ease of operation for non-critical edits while maintaining high security for critical recipe elements.
2Reliability
If encryption is applied to the integrated file to prevent unauthorized editing, then the security and reliability are improved, but the ease of operation deteriorates as authorized personnel face additional authentication requirements
Solution Approach 1:
Authentication and authorization checks are performed in advance before allowing access to or editing of the integrated file. The system pre-loads the encrypted file and establishes user credentials beforehand, so that when authorized personnel need to edit, the authentication is already complete and the process flows smoothly without repeated interruptions.
Solution Approach 2:
The system provides real-time feedback to users about their access permissions and authentication status. When a user attempts to access or edit an item file, the system immediately verifies permissions and notifies the user of the outcome, allowing for quick correction of authorization issues without prolonged system unavailability.
3Reliability
If the logout process and screen change process are performed after a predetermined time of inactivity, then the security is improved by preventing unauthorized access, but the productivity deteriorates due to interruptions in the editing workflow
Solution Approach 1:
The timeout period before automatic logout is made dynamic rather than fixed. The system can extend the timeout period during active editing sessions where the user is making progressive changes, while enforcing stricter timeouts when the system is idle or when switching between different security-sensitive operations. This allows the security mechanism to adapt to the actual usage context and minimize interruptions to productive work.
Data Source
AI summary
Described herein is a technique that may prevent unauthorized personnel from editing files without permission. A processing apparatus may include: an operating unit configured to display an operation screen for editing an integrated file containing: non-encrypted data corresponding to an item file; a drawing file; and encrypted data obtained by encrypting the item file; a memory unit configured to store the integrated file; and an arithmetic unit configured to: (a) compare the item file with data obtained by decrypting the encrypted data; and (b) combine and display the item file and the drawing file on the operation screen according to a result of comparison performed in (a).