Biometric Authentication Threshold Segmentation
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Solution Overview
Problem
Biometric authentication processes often require high thresholds for security, leading to excessive authentication steps and decreased user convenience, especially when using services with lower security levels, such as facial authentication with glasses.
Innovation Solution
An authentication device and method that assign different services to varying security thresholds based on the similarity between acquired biometric information and preregistered data, allowing for easier authentication by setting lower thresholds for services with lower security requirements, thereby increasing the probability of successful authentication with less precise biometric data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high threshold is set for biometric authentication to ensure high security, then security level is improved, but user convenience deteriorates due to excessive authentication steps and higher false rejection rates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the authentication threshold based on the service type. High-security services use a first (higher) threshold, while low-security services use a second (lower) threshold. This resolves the contradiction by allowing the system to maintain high security where needed while improving user convenience for less critical services through lower thresholds that reduce false rejections and authentication failures.
Solution Approach 2:
The patent segments the authentication system into multiple threshold levels corresponding to different service types. Instead of using a single uniform threshold, the system divides authentication requirements into at least two distinct threshold categories: a first threshold for high-security services and a second threshold for low-security services. This segmentation allows the system to optimize both security and convenience for different service contexts simultaneously.
2Reliability
If a high threshold is used for all services, then security is maintained, but authentication success rate decreases when biometric information is not perfectly accurate (e.g., facial authentication with glasses)
Solution Approach 1:
The patent changes the threshold parameter based on service security requirements. For low-security services, a lower second threshold is applied, which increases the authentication success rate when biometric information quality is imperfect (such as facial recognition with glasses). This resolves the contradiction by allowing successful authentication with less perfect biometric data for non-critical services while maintaining high thresholds for security-sensitive operations.
Solution Approach 2:
The patent implements dynamic threshold adjustment where the authentication threshold is not fixed but varies according to the service type being accessed. The system dynamically selects between a first threshold and a second threshold based on the security requirements of the requested service, allowing flexible adaptation to different authentication scenarios and improving success rates for services that can tolerate lower security requirements.
Data Source
AI summary
An authentication device that uses biometric authentication includes an acquisition unit configured to acquire first biometric information of a user, a storage unit configured to store second biometric information which is preregistered, a processing unit configured to obtain an authentication determination value based on similarity between the first biometric information acquired by the acquisition unit and the second biometric information stored in the storage unit, and a decision unit configured to decide a service providable to the user based on the authentication determination value and a plurality of thresholds to which different services are respectively assigned.