Image Forming Device Auto-Logout After Remote Job Execution

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Solution Overview

Problem

Existing image forming devices lack secure logout mechanisms, allowing unauthorized users to operate the device if a user does not perform a logout process after a certain period of time following job execution, posing a security risk.

Innovation Solution

The image forming device implements a user login and automatic logout process based on user information included in job information received from a terminal, ensuring secure operation by automatically logging out the user after job execution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the image forming device does not perform a logout process unless a certain period of time has elapsed after job execution, then the device maintains operational continuity and user convenience, but security is compromised allowing other users to operate the device

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

Solution Approach 1:

The system performs logout preparation in advance by monitoring job execution status and pre-establishing the logout timeline. When job execution completes, the system automatically initiates the logout process without waiting for manual user action or time delay, thereby preventing unauthorized access while maintaining smooth operation flow.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system implements a feedback mechanism that continuously monitors job execution status and automatically triggers logout based on job completion signals. This closed-loop control ensures that logout occurs precisely when needed, balancing security requirements with operational convenience by responding to real-time system state changes.

Inventive Principle:
Principle #23Feedback

2Reliability

If manual logout process is required, then user control over device access is maintained, but security is weakened when users forget to logout

Engineering Contradiction:
ImprovesecurityVSAvoidlogout process complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The logout process is automated to serve itself without requiring manual user intervention. The system monitors job execution status, detects completion, and automatically executes logout procedures. This self-service mechanism eliminates human error while maintaining simple operation for users, as they simply need to initiate jobs without managing logout procedures.

Inventive Principle:
Principle #25Self-service

3Reliability

If automatic logout is implemented immediately after job execution, then security is enhanced, but user convenience is reduced as users cannot continue operating the device

Engineering Contradiction:
ImprovesecurityVSAvoidoperational continuity
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system prepares for logout in advance by monitoring job execution status and pre-establishing the logout timeline. When job execution completes, the system automatically initiates the logout process without waiting for manual user action or time delay, thereby preventing unauthorized access while maintaining smooth operation flow.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts access rights based on real-time job execution status. During job execution, user access is maintained for operational continuity. Upon job completion, the system dynamically transitions to logout mode, automatically revoking access. This dynamic control allows the system to adapt access policies to current operational needs, balancing security with convenience.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS20250291529A1Data processing device, image forming device, control method therefor, and non-transitory computer-readable storage medium
Publication Date: 2025.09.18 CANON KK
  • US20250291529A1 patent drawing
  • US20250291529A1 patent drawing
  • US20250291529A1 patent drawing

AI summary

An image forming device includes a memory; and at least one processor in communication with the memory. The at least one processor of the image forming device is configured to perform: receiving job information for executing a function of the image forming device from a terminal, the job information including user information; based on the user information included in the received job information, logging a user into the image forming device; executing a job based on the received job information; and based on execution of the job, logging out the user from the image forming device.