Auditing System Dynamic Page Filtering for Storage Optimization
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Solution Overview
Problem
Conventional auditing systems for digital multifunction peripherals face challenges in effectively sampling image data for storage, leading to reduced storage capacity without compromising information leakage suppression, and often result in inadequate detection of malicious activities due to fixed page extraction methods.
Innovation Solution
The system implements a dynamic page filtering process that allows users to set operational conditions for storing image data, including options for storing all pages, designated consecutive pages, random pages based on a rate, or pages determined by a storage probability, enabling flexible and adaptive data sampling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data of all pages is stored to ensure detection of information leakage, then information leakage suppression effectiveness is improved, but storage capacity requirements increase significantly
Solution Approach 1:
The patent implements page filtering that stores image data of only selected pages (e.g., first page, last page, or randomly selected pages) rather than all pages. This partial action approach reduces storage requirements while maintaining sufficient effectiveness in detecting information leakage by capturing representative samples of the processed documents.
2Device complexity
If fixed page extraction methods are used to simplify the sampling process, then device complexity is reduced, but detection precision of malicious activities deteriorates
Solution Approach 1:
The patent introduces dynamic page selection mechanisms where the pages to be stored are determined based on varying criteria such as random selection, positional rules (first/last pages), or metadata-based selection. This dynamic approach adapts to different scenarios to maintain detection precision while managing system complexity through configurable selection strategies.
3Measurement precision
If random page extraction is implemented to improve detection effectiveness, then detection precision is improved, but storage capacity reduction is less effective compared to fixed methods
Solution Approach 1:
The patent employs configurable parameters for page filtering including selection ratios, page position criteria, and random seed values. By adjusting these parameters, the system can optimize the balance between detection precision and storage capacity reduction, allowing flexible adaptation to different security requirements and storage constraints.
Data Source
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AI summary
An auditing system that stores job history information of a job to be executed by an image forming apparatus, the auditing system includes setting means for setting page filtering conditions, and acquisition means configured, if the page filtering conditions include a setting of a ratio of pages containing image data to be acquired to all pages included in the job to be executed by the image forming apparatus, to randomly acquire image data of a number of pages corresponding to the ratio, from the pages included in the job, as the job history information.