Vehicle Biometric Authentication System with Encrypted Local Storage

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Solution Overview

Problem

Fingerprint authentication in vehicles with large user databases is time-consuming, and there is a risk of vehicle theft due to the storage of biometric information in door handles.

Innovation Solution

A vehicle system utilizing non-volatile and volatile memory for encrypted user biometric storage, where a detector obtains biometric information and a controller decrypts and authenticates it using identification information, preventing theft by deleting stored data when the door is detached.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If biometric information is stored in the vehicle for authentication, then user authentication can be performed, but the authentication process takes a large amount of time when the server has a lot of user information

Engineering Contradiction:

Improveuser authenticationVSAvoidauthentication process time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent divides the authentication system into two parts: a server that stores encrypted biometric templates and a vehicle that performs local authentication using decrypted templates. This segmentation allows the vehicle to perform fast local authentication while the server maintains the master database, resolving the contradiction between authentication reliability and speed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary decryption of biometric templates from encrypted form to decrypted form and stores them in the vehicle's memory before authentication is needed. This preliminary action enables the vehicle to perform fast local authentication without querying the server during the authentication process, significantly reducing authentication time.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If biometric information is stored in the door handle for authentication, then user authentication can be performed, but the vehicle is vulnerable to theft through door handle detachment

Engineering Contradiction:

Improveuser authenticationVSAvoidvehicle theft risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the biometric authentication function from the door handle and relocates it to the vehicle's main control system. The door handle no longer stores or processes biometric information independently, eliminating the security vulnerability of door handle detachment while maintaining authentication functionality through the centralized vehicle controller.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces the vehicle's main controller and encrypted storage system as intermediaries between the biometric sensor and the authentication decision. Biometric data is encrypted and stored securely in the vehicle's memory rather than in the door handle, and authentication is performed by the main controller using decrypted templates from the server, preventing theft through door handle removal.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10486647B2Vehicle and method for controlling thereof

Publication Date: 2019.11.26 HYUNDAI MOTOR CO LTD

AI summary

A vehicle may include a detector to detect and obtain biometric information, a first storage to store encrypted user biometric information, a second storage to store identification information of a user, and a first controller to decrypt the encrypted user biometric information when the detector detects the encrypted user biometric information based on the identification information received from the second storage. The first controller authenticates the user based on whether the detected biometric information is identical to the decrypted user biometric information.