Biometric Vehicle Authentication Using Conditional Key Transmission

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Solution Overview

Problem

Existing authentication systems using biological information for vehicle access, such as fingerprint sensors, risk personal information leakage due to unauthorized access or theft.

Innovation Solution

An authentication system that includes a user device and a mobile device, where the user device determines a predetermined condition and transmits key information only when satisfied, and the mobile device acquires and authenticates using encrypted biological information for secure access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If fingerprint information is registered in the vehicle for authentication, then user convenience is improved, but the risk of personal information leakage increases when the vehicle is stolen

Engineering Contradiction:

Improveauthentication convenienceVSAvoidpersonal information leakage risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The authentication system is divided into two separate components: a first device (mobile device) that stores biological information and a second device (vehicle) that performs authentication. This segmentation ensures that if the vehicle is stolen, the biological information remains secure in the user's mobile device, eliminating the risk of personal information leakage while maintaining authentication convenience.

Inventive Principle:

Principle #1Segmentation

2Loss of time

If biological information is stored in the vehicle for authentication, then authentication speed is improved, but security against unauthorized access deteriorates

Engineering Contradiction:

Improveauthentication timeVSAvoidsecurity against theft

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

A mobile device acts as an intermediary between the user and the vehicle authentication system. The mobile device stores biological information and communicates with the vehicle, enabling fast authentication through wireless communication while keeping sensitive data outside the vehicle, thus maintaining both speed and security.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If key information is transmitted continuously for authentication, then user convenience is improved, but the risk of key information interception increases

Engineering Contradiction:

Improveaccess convenienceVSAvoidkey information interception risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

Key information is transmitted periodically only when authentication is required, rather than continuously. The system establishes communication channels on-demand, reducing the window of opportunity for interception while maintaining user convenience through automatic authentication processes.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12585746B2Authentication system, user device, and key information transmission method

Publication Date: 2026.03.24 NEC CORP

AI summary

The biological information acquisition means acquires biological information of the user. The determination means determines whether a predetermined condition is satisfied. In a case in which it is determined that the predetermined condition is satisfied, the key information transmission means transmits the key information to the mobile device. An authentication means authenticates the user by using the acquired biological information, encrypted biological information for collation, and the key information received by the key information reception means from the user device.