Biometric Template Updating Without User Re-Registration

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Solution Overview

Problem

Existing biometric authentication systems face security risks due to template leakage, and updating templates requires re-entering biometric information, which is time-consuming and labor-intensive for users.

Innovation Solution

A biometric authentication system that generates an update value to update both the template and verification key used for concealed biometric information, maintaining consistency and security without requiring user re-registration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the template is updated by requesting the user to re-enter biometric information, then the template can be updated to maintain security, but the process becomes time-consuming and labor-intensive for the user

Engineering Contradiction:

Improvetemplate securityVSAvoiduser registration time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs template updates automatically using pre-stored biometric information and generated update values, without requiring user intervention or re-registration. The update processing unit autonomously updates both the template and verification key using the update value, making the system self-servicing for maintenance tasks.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system pre-stores biometric information in a secure manner during initial registration, and pre-generates update values that can be used later for template updates. This preliminary preparation eliminates the need for users to re-enter biometric information when updates are needed.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the template is updated using a different encryption key, then security is improved, but the verification key must also be updated and consistency must be maintained

Engineering Contradiction:

Improveauthentication securityVSAvoidtemplate and key management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system merges the template update and verification key update operations into a single unified process. The update processing unit simultaneously updates both the template and verification key using the same update value, ensuring consistency between them while simplifying the overall update mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The update value serves as an intermediary element that enables consistent updates of both the template and verification key. By using this intermediate update value, the system maintains the mathematical relationship between the template and verification key without requiring complex coordination between multiple update operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12591648B2Biometric authentication system, template updating method therefor, storage medium, biometric authentication client device, and biometric authentication server device

Publication Date: 2026.03.31 NEC CORP

AI summary

A conventional biometric authentication system has been time-consuming and labor-intensive for users since the users are requested to re-register their biometric information. According to an aspect of the present disclosure, a biometric authentication system includes an update value generation unit configured to generate an update value, a first update processing unit configured to update, using the update value, a template generated based on biometric information, and a second update processing unit configured to update, using the update value, a verification key generated along with the template based on the biometric information using the update value.