Device Control System User ID Verification for Remote Security

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Solution Overview

Problem

There is a risk of unexpected device operations when a user hands over a device, especially if the server settings are not properly updated, leading to potential misuse through remote control by the previous user.

Innovation Solution

A device control system that writes a user ID to its memory and compares it with the ID in incoming messages, only executing commands if they match, thereby preventing unauthorized operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If remote control functionality is added to home electrical appliances, then ease of operation is improved, but device security deteriorates due to risk of unexpected operations after handover

Engineering Contradiction:

Improveremote control capabilityVSAvoiddevice security

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs preliminary action by registering the user ID in the memory before allowing remote control operations. The device stores the authorized user ID in advance, so when a remote control command arrives, the device can immediately compare the command's user ID with the stored ID to verify authorization before executing the command.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If user ID verification mechanism is implemented, then device security is improved, but device complexity increases due to additional comparison processing

Engineering Contradiction:

Improvedevice securityVSAvoidcontrol logic complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system extracts the user ID verification function from the main control flow and implements it as a separate, dedicated comparison mechanism. The device memory stores the authorized user ID independently, and the control unit performs a simple comparison operation between the command's user ID and the stored ID, isolating the security function from other device operations.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If user ID registration is required before handover, then device security is improved, but ease of operation deteriorates due to additional setup steps

Engineering Contradiction:

Improvedevice securityVSAvoidhandover convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system implements self-service by automatically storing the user ID in the device memory when the device is initially set up or when the user ID is provided through the communication unit. This automatic registration eliminates the need for manual intervention during handover, as the device autonomously maintains the authorized user information without requiring additional setup steps.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS10917381B2Device control system, device, and computer-readable non-transitory storage medium

Publication Date: 2021.02.09 YAMAHA CORP

AI summary

Provided is a device control system including: a device, which has a device ID for identifying the device, and is configured to write a user ID for identifying a user in a memory based on an instruction to register the user ID; and a server configured to transmit a message containing the user ID and a command to the device having the device ID. The device is configured to: receive the message, and compare the user ID contained in the message and the written user ID; and determine whether the command contained in the message is executable in accordance with a result of the comparison.