Biometric Authentication Apparatus Using One-Way Function
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Solution Overview
Problem
User authentication methods that vary by service require users to preregister multiple times, leading to a heavy workload and potential service denial if a keyword is forgotten.
Innovation Solution
An authentication apparatus that generates a biometric key from user information using a one-way function, acquires a public key, and creates a secret key and public key pair with random information, generating identification information for verification, and updates this information when conditions change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user authentication is performed by using an authentication method varying for each service, then user authentication can be performed for each service, but a user needs to preregister information required for authentication in a plurality of authentication systems, leading to a heavy workload
Solution Approach 1:
The patent implements a universal authentication system where a single biometric authentication result is accepted across multiple services. The authentication information generation unit creates authentication information based on biometric authentication results, which can be utilized by different services without requiring separate authentication processes for each service, thereby reducing user workload while maintaining authentication reliability
Solution Approach 2:
The patent merges multiple authentication systems into a unified authentication framework. By combining biometric authentication with authentication information generation, the system consolidates what would otherwise be separate authentication processes into a single integrated flow, eliminating the need for users to preregister multiple times for different services
2Reliability
If user authentication is performed by a movement of the mouth when a specific word is spoken, then user authentication can be performed, but a user cannot receive a service when the user forgets a keyword associated with the service
Solution Approach 1:
The patent replaces keyword-based acoustic authentication with biometric authentication. Instead of relying on users to recall and speak specific keywords, the system uses physiological biometric data (such as facial recognition, fingerprint, or voice characteristics) that users cannot forget, thereby maintaining authentication accuracy while improving service accessibility
Solution Approach 2:
The patent changes the authentication parameter from user-dependent keywords to user-inherent biometric characteristics. This parameter change ensures that authentication is based on immutable physical traits rather than memorized information, preventing service denial due to forgotten keywords while maintaining secure authentication
Data Source
AI summary
An authentication apparatus (1) generates, when a first condition is satisfied, a biometric key from biometric information of a user by means of a predetermined one-way function. The authentication apparatus (1) acquires an information processing device public key from an information processing device (7), generates an authentication apparatus secret key and an authentication apparatus public key based on the biometric key and random information, and generates a common key based on the authentication apparatus secret key and the information processing device public key, and thereby generate, based on the random information and the common key, identification information for verifying validity of the user. The authentication apparatus (1) instructs the information processing device (7) to verify validity of the user using the identification information, and updates the identification information when a second condition that is different from the first condition is satisfied.