Temporary Biometric Templates for Authentication State
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Solution Overview
Problem
Traditional facial recognition templates face challenges in balancing flexibility to accommodate changing user appearances due to expressions, accessories, and styles while maintaining high security to distinguish between similar-looking individuals, leading to increased false accept rates.
Innovation Solution
The implementation of temporary biometric templates that continuously track and update a user's biometric features, such as facial images, allowing for a high match threshold while accommodating variations in appearance, ensuring secure authentication without requiring direct alignment or constant visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single master template is built up over time to accommodate changing user appearances, then the template becomes more forgiving to expression and style changes, but the false accept rate increases and security decreases
Solution Approach 1:
The patent divides the biometric authentication system into multiple separate templates (first template, second template, third template) instead of using a single master template. Each template is created at different time points and stores biometric data under different conditions. This segmentation allows the system to maintain multiple reference points for comparison, preventing the degradation of security that occurs when a single template accumulates too much variation over time.
Solution Approach 2:
The system dynamically selects which template to use for authentication based on current conditions. The template selection module chooses among multiple templates depending on the specific authentication context, allowing the system to adapt to changing user appearances without compromising security. This dynamic approach replaces the static single-template model with a flexible multi-template selection mechanism.
2Adaptability or versatility
If the matching threshold is reduced to accommodate appearance changes, then the template accepts more varied appearances, but similar-looking individuals are more easily falsely accepted
Solution Approach 1:
The patent segments the authentication process into multiple template comparisons rather than using a single threshold against one master template. By maintaining separate templates captured at different times and conditions, the system can compare the current biometric data against multiple reference points, preserving discrimination precision while accommodating appearance changes through the diversity of reference templates.
Solution Approach 2:
The system changes the parameter of template selection based on authentication context rather than using a fixed threshold. By selecting appropriate templates from multiple available options based on current conditions, the system effectively adapts the matching criteria dynamically, maintaining precision while accommodating variation without relying on threshold reduction.
3Ease of operation
If continuous biometric tracking is implemented to maintain authenticated state, then user convenience is improved without repeated authentication, but system complexity increases
Solution Approach 1:
The patent implements preliminary template creation and selection before the authentication session begins. Multiple templates are pre-created at different time points, and the appropriate template is selected in advance based on current conditions. This preliminary preparation simplifies the ongoing authentication process by eliminating the need for complex real-time template generation, reducing system complexity while maintaining user convenience.
Solution Approach 2:
The system creates simplified copies of biometric data in the form of discrete templates at specific time points, rather than maintaining continuous complex biometric models. These template copies capture the essential biometric characteristics at different moments, enabling efficient comparison and tracking without requiring complex continuous processing, thus reducing system complexity while preserving authentication accuracy.
Data Source
AI summary
Temporary biometric templates for maintaining a user authenticated state are described herein. In some implementation, an electronic device receives an input to unlock using a first secure authentication technique to initiate a current unlock session. A temporary biometric template of a biometric feature of a user unlocking the electronic device is created effective to initiate a user authenticated state. The biometric feature of the user associated with the temporary biometric template is tracked during the current unlock session. The user authenticated state is maintained based on a comparison of the tracked biometric feature of the user with the biometric feature of the temporary biometric template. When the biometric feature of the user can no longer be tracked, the user authenticated state is terminated and the temporary biometric template is invalidated.