Biometric Authentication Apparatus with Segmented High Accuracy Comparison
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Solution Overview
Problem
Biometric authentication systems face errors due to posture mismatch and external light interference, making it difficult to identify the cause of authentication failures without compromising security and privacy by saving sensitive data.
Innovation Solution
A biometric authentication apparatus with a comparator for initial authentication, a high accuracy comparator for re-evaluation, and a comparison result storage that records detailed logs of posture and light conditions to analyze and reduce errors without saving authentication data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If authentication data including face and vein data is saved as log, then cause of authentication error can be investigated, but security and privacy are compromised
Solution Approach 1:
The patent extracts only the necessary authentication error cause information (posture mismatch, external light conditions) from the authentication process, separating it from the sensitive biometric data. This allows error investigation without storing face or vein data, resolving the contradiction between information availability and security.
Solution Approach 2:
The patent introduces an intermediary logging mechanism that captures error cause information through indirect observation (comparator results, light sensor data, posture analysis) rather than directly storing sensitive biometric data. This intermediary layer enables error investigation while maintaining security and privacy.
2Productivity
If simple comparison is used for authentication, then processing speed is fast, but authentication accuracy is low causing false rejections
Solution Approach 1:
The patent segments the authentication process into two stages: a first comparator for fast initial authentication and a second comparator for high-accuracy re-evaluation of failed cases. This segmentation maintains overall processing speed while improving accuracy for borderline cases, reducing false rejections.
Solution Approach 2:
The patent applies partial high-accuracy processing only to authentication cases that fail the initial comparison, rather than applying full high-accuracy processing to all cases. This selective approach maintains processing efficiency while improving accuracy where needed, reducing false rejections without sacrificing overall speed.
3Reliability
If high accuracy comparison is applied to all authentication cases, then authentication accuracy is improved, but processing time increases
Solution Approach 1:
The patent applies high-accuracy comparison only partially - specifically to cases where the first comparator fails to authenticate. This selective application of high-accuracy processing improves overall authentication accuracy while minimizing the time penalty, as most authentications can be resolved by the faster first comparator.
Solution Approach 2:
The patent segments the comparison process into a fast first comparator for initial screening and a high-accuracy second comparator for re-evaluation. This segmentation ensures that high-accuracy processing is applied only when necessary, balancing authentication accuracy with processing time efficiency.
Data Source
AI summary
A biometric authentication apparatus is provided, the apparatus including: a comparator that performs authentication of the user by comparing biological information read from a user with registered biological information registered in a storage in advance; a high accuracy comparator that compares the biological information with the registered biological information with a higher accuracy instead of comparison using the comparator when the user is not authenticated by the comparator; and a comparison result storage that records a comparison result obtained by the high accuracy comparator in the storage.