Automated Vehicle Digital Key Password Delivery After Mobile Replacement

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Solution Overview

Problem

The existing digital key systems require significant time and effort for reissuing passwords when a mobile information terminal is replaced or changed, leading to inconvenience for vehicle owners.

Innovation Solution

A management device and method that issues a password automatically to a mobile information terminal to re-register a digital key, either directly to the terminal's application, via email, or through NFC communication, reducing the need for manual input.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a password is required to be reissued when a mobile information terminal is replaced, then security is maintained, but the time and effort required for re-registration increases

Engineering Contradiction:

ImprovesecurityVSAvoidtime and effort for re-registration

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The management device stores the owner key and associated password information in advance in its storage unit. When a mobile information terminal is replaced, the password can be quickly reissued by retrieving the pre-stored information, rather than requiring a time-consuming re-registration process. This preliminary preparation of data enables fast password reissuance while maintaining security.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If manual password input is required for re-registration, then password security is maintained, but the ease of operation decreases

Engineering Contradiction:

Improvepassword securityVSAvoidease of re-registration

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The management device automatically transmits the password to the newly replaced mobile information terminal without requiring manual input from the user. The system performs the password delivery service itself through automated communication protocols, eliminating the need for users to manually type or enter the password, thus improving ease of operation while maintaining security through automated secure transmission.

Inventive Principle:

Principle #25Self-service

3Reliability

If a new password is required when the mobile information terminal is replaced, then key security is maintained, but the convenience of the user decreases

Engineering Contradiction:

Improvekey securityVSAvoiduser convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The management device acts as an intermediary between the security system and the user's mobile information terminal. It automatically handles the password generation, storage, and transmission processes, mediating the security requirements with user convenience. The intermediary system ensures secure password management while eliminating the burden of manual password handling from the user.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250209151A1Management device, management method, and non-transitory storage medium

Publication Date: 2025.06.26 TOYOTA JIDOSHA KK

AI summary

A management device manages a digital key. The digital key is registered in a mobile information terminal to operate a vehicle. This management device includes a processor configured to execute a process for issuing a password on a condition that an owner key that is a digital key registered in the mobile information terminal of a vehicle owner is deleted from the mobile information terminal, the password being needed to reregister the owner key.