Fingerprint Sensor Keyboard for Secure Password Authentication
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Solution Overview
Problem
Existing personal authentication systems face challenges in achieving both security reinforcement and authentication accuracy improvement without compromising user convenience, particularly in scenarios where password input is combined with fingerprint authentication.
Innovation Solution
A personal authentication system that includes a detection device with a sensor and a control device, where the detection device allocates segmented regions for each key inputting of a password and outputs segmented images for fingerprint image synthesis, enhancing authentication accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If password authentication is combined with biometric authentication to reinforce security, then security level is improved, but user convenience deteriorates
Solution Approach 1:
The patent merges password authentication and fingerprint authentication into a single integrated process. The fingerprint sensor is integrated into the keyboard, allowing users to input password while their fingerprint is automatically captured during the same interaction, eliminating the need for separate authentication steps and maintaining user convenience while reinforcing security.
Solution Approach 2:
The keyboard serves multiple functions: it acts as both the password input interface and the fingerprint sensing device. By making the fingerprint sensor transparent and integrating it into the keyboard structure, the system achieves multi-functionality where a single device (keyboard) performs both text input and biometric authentication, improving convenience.
2Ease of operation
If fingerprint detection is performed during password inputting with extremely short touch time, then user convenience is maintained, but authentication accuracy deteriorates
Solution Approach 1:
The system performs preliminary fingerprint image acquisition during the password input process itself. Instead of requiring a separate fingerprint scanning action, the fingerprint image is captured preliminarily during the natural password input interaction, ensuring that the fingerprint data is collected before the authentication decision is made, thereby maintaining both convenience and accuracy.
Solution Approach 2:
The fingerprint sensing operates continuously during the password input process. The keyboard maintains fingerprint detection capability throughout the entire password input duration, ensuring that even with short touch times, the fingerprint image can be adequately captured and synthesized from multiple frames, maintaining authentication accuracy without compromising convenience.
3Reliability
If multiple authentication methods are implemented, then security is reinforced, but device complexity increases
Solution Approach 1:
The patent combines multiple authentication methods (password and fingerprint) into a single integrated authentication system. The fingerprint sensor is merged with the keyboard structure, and the authentication process merges password input with fingerprint capture into one unified flow, reducing device complexity while maintaining reinforced security.
Data Source
AI summary
A personal authentication system includes: a detection device having a first period in which detection of a detection target body is performed and a second period in which detection of asperities on a surface of the detection target body is performed; and a control device. The detection device has, as input keys for a password, first regions in a detection region. The detection device is configured to allocate mutually different segmented regions in a second region having center coordinates at touch detection coordinates detected in the first region in the first period for each key inputting of the password, and output a segmented image acquired in the segmented region in the second period to the control device for each key inputting of the password. The control device is configured to generate a fingerprint image by synthesizing the segmented images acquired in the respective key inputtings of the password.