Authentication Device Multi-Challenge Biometric Verification

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Solution Overview

Problem

CAPTCHA-based verification of user existence is insufficient for providing safe and highly reliable online services, as it becomes challenging for humans to distinguish complex challenge images and may not adequately prevent advanced decipher programs.

Innovation Solution

An authentication system that transmits multiple challenges to a terminal device, including ones requesting biometric information, and determines the correctness of user responses, while also verifying the appropriateness of time information related to the challenges and responses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If CAPTCHA-based verification uses complex challenge images to prevent advanced decipher programs, then security against bots is improved, but ease of operation for humans deteriorates as it becomes challenging to distinguish complex challenge images

Engineering Contradiction:

Improvesecurity against botsVSAvoidease of distinguishing challenge images

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The verification process is divided into multiple stages: first verifying the user is human through existence verification (using simpler CAPTCHA), then performing identity verification (using biometric data). This segmentation allows each stage to have optimized complexity appropriate to its purpose.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary authentication device that manages the verification process. This device handles the complexity of biometric verification and identity confirmation, shielding the user from these complex operations while maintaining security.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If CAPTCHA verification is simplified for ease of human operation, then ease of operation is improved, but reliability of preventing advanced decipher programs deteriorates

Engineering Contradiction:

Improveease of solving CAPTCHAVSAvoideffectiveness against advanced decipher programs

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary existence verification using simpler CAPTCHA to ensure the user is human before proceeding to more complex identity verification. This preliminary action filters out bots early while maintaining ease of operation for legitimate users.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If multiple challenges including biometric information are transmitted to verify user existence and identity, then reliability of authentication is improved, but device complexity increases

Engineering Contradiction:

Improveauthentication reliabilityVSAvoidcomplexity of authentication system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The authentication device performs multiple functions: existence verification (CAPTCHA), identity verification (biometric comparison), and uniqueness verification. By consolidating these functions into a single device, the patent reduces overall system complexity while maintaining high authentication reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges existence verification, identity verification, and uniqueness verification into a unified authentication process managed by a single authentication device. This consolidation simplifies the architecture compared to having separate verification systems.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If biometric information is used for identity verification, then reliability of verifying user identity is improved, but device complexity and processing requirements increase

Engineering Contradiction:

Improveidentity verification accuracyVSAvoidcomplexity of biometric processing

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system uses pre-stored template data (copies of biometric information) for comparison. Instead of complex real-time biometric analysis, the authentication device compares captured biometric data against pre-stored templates, significantly reducing processing complexity while maintaining verification reliability.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20250173418A1Authentication device, authentication system, and authentication method

Publication Date: 2025.05.29 NEC CORP

AI summary

In order to improve the safety and reliability of services provided by a computer, this authentication device is equipped with a transmission unit and a determination unit. The transmission unit transmits a challenge to a terminal device where the challenge is presented to a user to be authenticated, said challenge being information serving as the basis on which the user inputs information to be used for authentication processing. At this time, the transmission unit transmits a plurality of different challenges to the terminal device. The determination unit determines not only whether or not a response input to the terminal device by the user in response to each challenge is correct, but also whether or not time information regarding the challenge and the response thereto satisfies a condition regarding the response.