Terminal Device Authentication with Dynamic Threshold and Biometric Feedback
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Solution Overview
Problem
Existing authentication methods in terminal devices require users to input multiple types of biometric and non-biometric information sequentially, leading to a heavy operational burden when initial authentication attempts fail, such as from fingerprint to vein authentication and IC card login.
Innovation Solution
A terminal device with an authentication information acquirer, determiner, and updater that assesses authentication success based on a combination of biometric and action information, allowing for reduced user interaction by determining successful authentication through a combination of biometric and action-specific criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple types of biometric information and non-biometric information are used in order for authentication, then authentication reliability is improved, but operational burden on user increases
Solution Approach 1:
The system performs preliminary authentication using biometric information (fingerprint, face, voice) before requiring non-biometric information. By预先 acquiring biometric data and using it as the primary authentication method, the system reduces the need for users to sequentially input multiple types of authentication information, thereby maintaining high authentication reliability while reducing operational burden.
Solution Approach 2:
The system merges multiple authentication methods (biometric and non-biometric) into a unified authentication flow where biometric information serves as the primary key. The control unit intelligently combines results from different authentication types, allowing users to authenticate with biometric information alone or in combination with non-biometric information, thus reducing the sequential operational burden while maintaining comprehensive authentication reliability.
2Ease of operation
If biometric information is used for authentication, then ease of operation is improved, but measurement precision decreases due to false recognition
Solution Approach 1:
The system implements feedback mechanisms where the control unit monitors authentication results from biometric information and adjusts the authentication process accordingly. When biometric authentication results are ambiguous or fall within a permissible range, the system provides feedback by additionally acquiring non-biometric information to confirm or refute the authentication result, thereby improving measurement precision while maintaining ease of operation through automated decision-making.
Solution Approach 2:
The control unit acts as an intermediary that mediates between biometric authentication results and final authentication decisions. It introduces a permissible range threshold as an intermediary criterion, where results within this range trigger additional non-biometric authentication steps. This intermediary mechanism resolves the contradiction by automatically managing the balance between ease of operation and measurement precision without requiring user intervention.
3Ease of operation
If authentication threshold is set low to reduce operational burden, then ease of operation is improved, but authentication accuracy decreases
Solution Approach 1:
The system dynamically adjusts the authentication threshold based on the acquired authentication information. The control unit evaluates biometric information first and determines whether to apply a lower threshold for immediate authentication or to require additional non-biometric information based on the result's proximity to the threshold. This dynamic adjustment allows the system to maintain ease of operation for clear cases while ensuring authentication accuracy for borderline cases.
Solution Approach 2:
The system changes the authentication parameter (threshold application) based on the type and quality of acquired information. When biometric information clearly exceeds the authentication threshold, the system applies a convenient low-barrier authentication. When results are ambiguous or within the permissible range, the system changes the parameter by requiring additional non-biometric authentication, thereby balancing ease of operation and authentication accuracy through adaptive parameter adjustment.
Data Source
AI summary
A terminal device includes an authentication information acquirer acquiring pieces of authentication information, an authentication determiner determining whether authentication is successful based on, among the pieces of authentication information acquired by the authentication information acquirer, at least one piece, and an authentication information updater, when the authentication determiner determines that authentication is successful, updating pieces of saved authentication information with pieces of authentication information acquired by the authentication information acquirer. The authentication determiner, in the background, determines that authentication is successful when first authentication information acquired by the authentication information acquirer falls below a predetermined authentication threshold and, when the first authentication information is the authentication threshold or more and a predetermined authentication permissible value or less, determines whether authentication is successful based on second authentication information acquired by the authentication information acquirer.