Image Forming Apparatus Maintenance Authentication Control

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Solution Overview

Problem

Conventional user authentication techniques for image forming apparatus maintenance are inadequate in restricting unauthorized manipulations of maintenance setting items by service personnel, potentially compromising security.

Innovation Solution

An image forming apparatus and control method that include a maintenance authentication unit to authenticate maintenance workers, a restricting unit to limit changes to setting values, and a display control unit to manage the visibility of setting items based on authentication status, ensuring only authorized personnel can modify maintenance settings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional user authentication techniques are used for maintenance work, then service persons can perform maintenance operations, but unauthorized manipulations of maintenance setting items cannot be prevented

Engineering Contradiction:

Improvemaintenance operation accessibilityVSAvoidsecurity of maintenance setting items

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent segments the authentication process into two distinct types: maintenance authentication (for verifying service person credentials) and user authentication (for verifying user credentials). This segmentation allows the system to apply different authentication results to different setting items, enabling service persons to access maintenance settings while preventing unauthorized users from manipulating them.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by differentiating authentication requirements for different setting items based on their type. Maintenance setting items require both maintenance authentication and user authentication for modification, while user setting items only require user authentication. This localized differentiation of authentication strictness resolves the contradiction between ease of operation and security.

Inventive Principle:

Principle #3Local quality

2Productivity

If service persons are allowed to manipulate all maintenance setting items, then maintenance work can be performed efficiently, but security risks increase

Engineering Contradiction:

Improvemaintenance work efficiencyVSAvoidunauthorized manipulation risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic control of setting item accessibility based on authentication results. The display control unit dynamically determines which setting items are displayed and whether they can be modified, based on the combination of maintenance authentication and user authentication outcomes. This dynamic approach allows efficient maintenance work on authorized items while preventing unauthorized manipulations.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces an intermediary control mechanism (the control unit) that mediates between the service person's maintenance authentication and the user's authentication credentials. This intermediary enforces the rule that maintenance setting items require both authentication types for modification, thereby reducing unauthorized manipulation risk while maintaining maintenance productivity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If dual authentication is required for maintenance setting items, then security is enhanced, but operation complexity increases

Engineering Contradiction:

Improvesecurity of maintenance setting itemsVSAvoidauthentication process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies universality by using a single integrated authentication management system that handles both maintenance authentication and user authentication. The control unit universally applies the authentication results across all setting items, determining display and modification permissions in a unified manner. This multi-functional approach enhances security without proportionally increasing operational complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9477194B2Image forming apparatus capable of limiting range of operation during maintenance, control method therefor, and storage medium

Publication Date: 2016.10.25 CANON KK

AI summary

An image forming apparatus for preventing unauthorized manipulations of maintenance setting items by a service person includes a plurality of setting items having setting values changed by the maintenance work is stored in an HDD. A maintenance authentication unit performs authentication of the service person who performs the maintenance work. A restricting unit restricts change of the setting values by an authenticated service person. A user authentication unit performs authentication of a user who uses the image forming apparatus. When change of the setting values by the service person is restricted, a display control unit controls display of the plurality of setting items on a basis of whether or not the service person has been authenticated by the user authentication unit.