Dynamic Key Authority Segmentation for Vehicle Access Security

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Solution Overview

Problem

Existing key information management systems face security vulnerabilities when distributing key information to third parties for vehicle access, as they often provide full unlocking and activation authority, which can lead to unauthorized use and compromised vehicle security.

Innovation Solution

A key information management device and method that dynamically adjusts the authority for unlocking or activating a vehicle based on the mobile terminal receiving the key information, allowing for tailored access rights according to the service type and user identity, thereby limiting unnecessary access and enhancing security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If key information with all authorities for unlocking and activation is distributed to third-party mobile terminals, then service convenience is improved, but vehicle security deteriorates

Engineering Contradiction:

Improveservice convenienceVSAvoidvehicle security

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent segments the authority of key information into multiple distinct authorities: unlocking authority for different doors and activation authority for the vehicle. This allows selective distribution of specific authorities to different mobile terminals, enabling service convenience while maintaining security by not granting all authorities to third parties.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by making the authority of key information different according to the mobile terminal that is a distribution target. Different mobile terminals receive key information with different authorities tailored to their specific service needs, rather than uniformly distributing all authorities to all terminals.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If key information with comprehensive authorities is distributed to third parties, then service functionality is improved, but unauthorized vehicle use risk increases

Engineering Contradiction:

Improveservice functionalityVSAvoidunauthorized vehicle use risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent divides comprehensive key information authority into separate unlockable door authorities and vehicle activation authority. This segmentation enables the system to provide different service functionalities (trunk delivery, car sharing, etc.) while preventing unauthorized vehicle use by not distributing activation authority to third-party deliverers.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the parameter of authority scope in key information based on the distribution target and service type. Third-party deliverers receive key information with limited authority (trunk unlock only), while users receive key information with broader authority including vehicle activation, thus adapting functionality to security requirements.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11682248B2Key information management device, key information management method, and computer readable medium storing key information management program

Publication Date: 2023.06.20 TOYOTA JIDOSHA KK

AI summary

A key information management device includes a key information distribution unit configured to distribute, to a mobile terminal, key information for unlocking or activating a vehicle by the mobile terminal transmitting a predetermined transmission signal to the vehicle, and the key information distribution unit makes an authority regarding unlocking or activation of the vehicle, which is imparted to the key information, different according to the mobile terminal that is a distribution target.