Composite Finger Biometric Matching for Faster Authentication
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Solution Overview
Problem
Fingerprint authentication in integrated electronic devices faces challenges in reducing user delay while maintaining security, especially when finger conditions change over time.
Innovation Solution
An electronic device equipped with a finger biometric sensor and a processor that acquires and matches biometric data from multiple finger placements, generating composite data and updating enrollment data when certain thresholds are met, allowing for quicker authentication and adaptation to changing finger conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional single-placement fingerprint matching is used, then security is maintained, but user delay increases and authentication speed decreases
Solution Approach 1:
The system performs preliminary actions by acquiring multiple finger placement biometric data in advance and generating composite finger matching biometric data before authentication is needed. This preprocessing allows the system to have ready-to-use composite data that can be quickly matched during actual authentication, reducing user delay and improving authentication speed without compromising security
Solution Approach 2:
The system dynamically adapts to changing finger conditions by continuously updating enrollment biometric data with newly acquired composite finger matching biometric data. This dynamic updating ensures that the authentication system remains accurate and secure while adapting to variations in finger placement, pressure, and condition over time
2Adaptability or versatility
If enrollment biometric data is updated frequently, then adaptability to changing finger conditions improves, but system complexity and processing requirements increase
Solution Approach 1:
The system implements feedback mechanisms by comparing newly acquired composite finger matching biometric data with existing enrollment biometric data. Updates are performed based on match scores and thresholds, ensuring that only meaningful changes are incorporated. This feedback-driven approach enables adaptability to changing finger conditions while maintaining systematic control over the updating process
Solution Approach 2:
The system changes parameters by adjusting match score thresholds and updating enrollment data based on composite match scores. By monitoring match scores and selectively updating enrollment biometric data when thresholds are exceeded, the system adapts to finger condition changes without requiring complex processing for every single data acquisition event
Data Source
AI summary
A device may include a finger biometric sensor and a processor coupled thereto. The processor may acquire first and second finger matching biometric data based upon first and second finger placements adjacent the sensor. The processor may also perform a matching between the first and second finger matching data to generate composite finger matching data having an associated composite match score, perform another matching between the composite matching data and finger enrollment data when the composite match score exceeds a match threshold to generate an enrollment match score, and update the finger enrollment data with the composite matching data when the enrollment match score exceeds an enrollment threshold. In other embodiments, where the second finger matching data is acquired based upon a removal and replacement of the finger from adjacent the finger sensor, instead of or in addition to updating the finger enrollment data, a device function may be performed.