Image Processing Security Using Attribute-Based Censorship Lists

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Solution Overview

Problem

Printing apparatuses are vulnerable to attacks from malicious users and information leakage due to improper operations, especially when accessed from external networks, and existing censorship methods are inadequate in preventing the publication of sensitive information.

Innovation Solution

An image processing apparatus with a multifunction peripheral that registers multiple character string lists based on job attributes, performs text comparisons, and controls job execution based on the comparison results, using banned word lists tailored to job type, authentication level, and location to prevent information leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If censorship of print document content is implemented, then information leakage is prevented, but user convenience deteriorates

Engineering Contradiction:
ImprovesecurityVSAvoiduser convenience
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent applies local quality by implementing different censorship rules for different document types, users, and locations. Multiple character string lists are maintained with different censorship criteria, and the appropriate list is selected based on job attributes such as document type, user authentication level, and installation location, allowing customized censorship that balances security with user convenience for specific cases

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent implements dynamics by making the censorship process adaptive rather than static. The system dynamically selects which character string list to use based on job attributes determined at runtime, allowing the censorship strictness to change according to the specific job context, user credentials, and environmental factors without requiring manual reconfiguration

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If multiple character string lists are registered with different censorship criteria, then censorship flexibility is improved, but device complexity increases

Engineering Contradiction:
Improvecensorship flexibilityVSAvoidsystem complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a single censorship processing unit that can handle multiple character string lists through attribute-based selection. Rather than creating separate censorship systems for different scenarios, one universal system performs multiple censorship functions by dynamically selecting the appropriate character string list based on job attributes, reducing overall system complexity while maintaining flexibility

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS12621394B2Image processing apparatus with printing and scanning security, and control method for controlling an image processing apparatus
Publication Date: 2026.05.05 CANON KK
  • US12621394B2 patent drawing
  • US12621394B2 patent drawing
  • US12621394B2 patent drawing

AI summary

An image processing apparatus includes one or more memories and one or more processors. The one or more processors and the one or more memories are configured to register a plurality of character string lists, select a character string list from the plurality of character string lists based on an attribute of a job, perform a comparison process for comparing text information extracted from the job and at least one of the character strings in the selected character string list, and control execution of the job based on a comparison result of the comparison process.