Programmable Terminal Secure Screen Display
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Solution Overview
Problem
Conventional programmable terminal systems face issues with unauthorized access to confidential data and the need for exclusive tools to update and manage screen data, which complicates data transfer and requires skilled operators.
Innovation Solution
A programmable terminal system architecture that separates screen data into non-confidential and confidential components, where confidential data is stored on a server and displayed on a terminal device using volatile memory, allowing for secure access and management through multipurpose OA software without the need for exclusive tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all screen data is stored in the nonvolatile memory of the PT device, then the data can be easily accessed and displayed, but the confidential information becomes vulnerable to unauthorized access and theft
Solution Approach 1:
The patent divides screen data into two segments: confidential data stored on the server device and non-confidential data stored in the PT device's nonvolatile memory. This segmentation allows the system to maintain data security by keeping sensitive information centralized while preserving ease of access for non-sensitive data.
Solution Approach 2:
The patent introduces a volatile memory as an intermediary between the server device and the display system. Confidential data is temporarily loaded into volatile memory only when needed for display, and automatically erased when no longer required. This intermediary approach enables secure access to confidential information without permanently storing it in vulnerable locations.
2Manufacturing precision
If exclusive tools and software are used to manage and update screen data, then the data can be precisely controlled, but the system becomes difficult to operate and requires skilled personnel
Solution Approach 1:
The patent implements a universal data management system where a single integrated server device handles multiple functions: storing both confidential and non-confidential data, managing updates, and providing access to multiple PT devices. This universal approach replaces the need for device-specific exclusive tools, allowing any operator to manage screen data through standard web browsers without requiring specialized software or advanced skills.
Solution Approach 2:
The patent replaces the mechanical approach of using dedicated exclusive software tools with an electronic/web-based system. The server device communicates with PT devices through standard network protocols and web interfaces, eliminating the need for proprietary software installations and simplifying the update process to standard web page modifications that can be performed with general-purpose software.
3Reliability
If confidential data is stored on the server and loaded into volatile memory for display, then unauthorized access is prevented, but the system complexity increases
Solution Approach 1:
The patent implements a dynamic memory management system where the volatile memory content changes based on operational needs. Confidential data is loaded into volatile memory only when a screen requiring that data needs to be displayed, and is automatically erased when the screen is no longer active. This dynamic approach maintains security while adapting memory usage to actual operational requirements, reducing unnecessary complexity.
Data Source
AI summary
A Programmable Terminal (PT) system, a PT device and a PT system management method having a function of displaying a screen having a content on a display screen while at the same time positively preventing the leakage of confidential content are disclosed. When a part read from a screen data file corresponds to the part including a content acquired from a server device, a transmission request command including a information indicating a storage location of a content data corresponding to the contents in the server device is transmitted to the server device through a communication circuit, the content data arriving as a response from the server device is acquired through the communication circuit and stored in a volatile memory. The part is plotted and displayed using the content data stored in the volatile memory and a part configuration information contained in the screen data file in a nonvolatile memory.