Natural Pseudonymization for Context-Preserving Text Processing
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Solution Overview
Problem
Existing data processing systems struggle to effectively pseudonymize sensitive information while preserving context and functionality, particularly in clinical and medical text analysis, and fail to maintain local culture and meaning during data obfuscation.
Innovation Solution
A natural pseudonymization method that uses machine learning models to identify and replace sensitive information with contextually similar pseudonyms, preserving document structure and functionality, and includes a pseudonym table for re-identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If organic solvents are used in extraction processes, then extraction efficiency is improved, but environmental pollution and safety hazards increase
Solution Approach 1:
The patent changes the physical-chemical parameters of the extraction medium by using supercritical carbon dioxide instead of traditional organic solvents. By adjusting pressure and temperature parameters to achieve supercritical state, the extraction efficiency is maintained while eliminating the harmful effects of organic solvents, thus resolving the contradiction between extraction efficiency and environmental safety
Solution Approach 2:
The patent employs carbon dioxide which can be easily removed after extraction, leaving no residual contamination. The supercritical fluid is discarded after use but can be regenerated, avoiding the accumulation of harmful substances in the environment and products, thereby solving the pollution problem while maintaining high extraction efficiency
2Productivity
If high pressure and temperature are applied in supercritical fluid extraction, then extraction efficiency is improved, but energy consumption increases
Solution Approach 1:
The patent implements a continuous supercritical fluid extraction process where carbon dioxide is continuously circulated through the system. The fluid that has passed through the extraction chamber is regenerated and reused, maintaining continuous extraction action without interruption. This continuity reduces overall energy consumption compared to batch processes while sustaining high extraction efficiency
Solution Approach 2:
The patent utilizes phase transitions of carbon dioxide between supercritical and gaseous states to achieve extraction and separation. By controlling pressure and temperature changes, the supercritical fluid extracts components efficiently, then transitions to gas phase for easy separation and regeneration, reducing the energy required for subsequent processing steps
3Device complexity
If conventional extraction equipment is used, then device complexity is low, but extraction precision and control capability are insufficient
Solution Approach 1:
The patent divides the extraction system into distinct functional modules including pre-treatment section, supercritical extraction section, separation section, and regeneration section. Each module performs a specific function and can be independently controlled and optimized. This segmentation allows for precise control of extraction parameters while keeping individual module structures relatively simple
Solution Approach 2:
The patent introduces a supercritical fluid delivery system that acts as an intermediary between the pressure source and the extraction chamber. This intermediary system precisely controls the flow rate, pressure, and temperature of the supercritical carbon dioxide, enabling accurate control of extraction conditions without requiring complex direct control mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Preserves context and functionality of documents while ensuring compliance with data regulations by effectively obfuscating sensitive information, allowing seamless integration with downstream processing systems.
Implementation Method 1
supercritical fluid extraction and separation processes
Implementation Method 2
membrane separation techniques
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The present disclosure directs to systems and methods for natural pseudonymization used in downstream processing. A natural pseudonym has at least one information attribute that is the same as a piece of sensitive text information. The systems and methods can identify sensitive text information, select a natural pseudonym, modify a data stream of text data by replacing the piece of sensitive text information with the natural pseudonym, and provide the data stream for downstream processing. Further, after downstream processing, some systems and methods can receive the downstream output and reidentify the downstream output.