Face Authentication Terminal Biometric Key Verification
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Solution Overview
Problem
Face authentication systems using Public Biometrics Infrastructure (PBI) face reliability issues due to fluctuations in face image capture conditions such as position, posture, and ambient light, leading to unsuccessful authentication and reduced reliability.
Innovation Solution
A face authentication terminal that captures two face images at different timings, generates biometric secret keys and public keys, and verifies authentication before registering the public key in a database, ensuring successful authentication and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single face image is used for authentication, then the authentication process is simple and fast, but the reliability decreases due to fluctuations in capture conditions
Solution Approach 1:
The system performs preliminary actions by capturing multiple face images at different timings before authentication occurs. Specifically, it captures a first face image at a first timing and a second face image at a second timing, then generates corresponding biometric secret keys from these pre-captured images. This preliminary collection of multiple images allows the system to later select and use the most appropriate images for authentication, thereby improving reliability without complicating the actual authentication process.
Solution Approach 2:
The authentication process is segmented into distinct phases: image capture phase (capturing multiple face images at different timings), biometric key generation phase (generating biometric secret keys from the captured images), and authentication phase (using the generated keys for authentication). This segmentation allows the system to handle complexity in an organized manner, separating the data collection phase from the authentication decision phase.
2Reliability
If multiple face images are captured at different timings, then authentication reliability improves, but the time required for authentication increases
Solution Approach 1:
The system performs the time-consuming image capture and biometric key generation actions in advance, before the actual authentication request is received. By capturing multiple face images and generating corresponding biometric secret keys as preliminary actions, the system prepares authentication data beforehand, so that when authentication is actually needed, the process can proceed more quickly using the pre-generated keys.
Solution Approach 2:
The system creates copies of face images and generates biometric secret keys as representations of the original face data. These biometric secret keys serve as compressed, processed versions of the face images that can be used for authentication without requiring the full original images to be processed in real-time, thereby reducing authentication time while maintaining reliability.
Data Source
AI summary
A face authentication terminal generates a first biometric secret key from a face image of a person captured at a first timing when the person is detected by at least one of a camera and a thermal sensor. The face authentication terminal generates a second biometric secret key from the face image of the person captured at a second timing different from the first timing, generates a biometric public key based on the second biometric secret key, and sends the biometric public key to an authentication server to request biometric public key registration. The authentication server verifies whether the authentication is successful or not using the first biometric secret key and the biometric public key sent to the authentication server, and when the authentication is verified to be successful, the biometric public key registration is completed.