Biometric Sensor Merging Fingerprint and ECG for Liveness Detection
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Solution Overview
Problem
Current fingerprint authentication systems are vulnerable to spoofing attacks, as they rely solely on fingerprint data, which can be mimicked, and lack confirmation of user liveness, compromising security and authentication integrity.
Innovation Solution
A sensor system that combines a fingerprint sensor with a bio sensor, such as an electrocardiograph (ECG) sensor, to detect fingerprint data and biometric data, enabling a dual authentication mode that verifies both fingerprint and biometric information, thereby enhancing security and preventing fake fingerprint access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only fingerprint sensor is used for authentication, then authentication speed is fast and device complexity is low, but security reliability is insufficient due to spoofing vulnerability
Solution Approach 1:
The patent combines a fingerprint sensor and a bio sensor (ECG sensor) into a single integrated sensor system. The fingerprint acquisition region and ECG electrode are merged in the same device, allowing simultaneous capture of both fingerprint data and biometric data. This merging resolves the contradiction by achieving enhanced security reliability through multi-modal authentication while keeping the device structure relatively compact and integrated.
2Reliability
If dual authentication mode using both fingerprint sensor and bio sensor is implemented, then spoofing prevention capability is enhanced, but authentication time increases
Solution Approach 1:
The system performs preliminary action by capturing both fingerprint data and biometric data simultaneously during a single user contact event. The ECG electrode is positioned to detect biometric signals while the fingerprint sensor captures fingerprint patterns, both in the same authentication gesture. This preliminary simultaneous capture reduces authentication time compared to sequential scanning methods.
Solution Approach 2:
The system implements partial action by offering two authentication modes: a first authentication mode using only the fingerprint sensor for faster authentication, and a second authentication mode using both fingerprint sensor and bio sensor for enhanced security. This allows the system to apply the appropriate level of authentication based on the situation, balancing security requirements with time efficiency.
3Reliability
If ECG electrode is positioned to detect biometric data during fingerprint contact, then user liveness verification is improved, but ease of operation decreases due to additional contact requirements
Solution Approach 1:
The ECG electrode is merged with the fingerprint acquisition region, positioning it to automatically detect biometric data when the user places their finger on the fingerprint sensor. This merging ensures that liveness detection is performed passively during the normal fingerprint authentication gesture, without requiring additional user actions or separate contact points.
Solution Approach 2:
The sensor system performs self-service by automatically capturing both fingerprint and biometric data during a single user interaction. The system itself provides the liveness detection functionality without requiring the user to perform additional actions, making the process as simple as placing a finger on the sensor.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dual authentication mode significantly increases security by confirming user liveness and preventing spoofing attacks, ensuring the integrity of financial and personal information transactions.
Implementation Method 1
a bio sensor connected to the electrodes to detect at least one type of biometric data
Implementation Method 2
The optical fingerprint sensor acquires a fingerprint image using total reflection of light input from a light source to a prism
Implementation Method 3
The ultrasonic fingerprint sensor senses a fingerprint using ultrasonic waves and is able to sense not only the surface (i.e., outer layer) of skin but also the inner skin below the outer layer
Implementation Method 4
A capacitive sensor, one of semiconductor fingerprint sensors, senses a fingerprint by a difference in capacitance which occurs when a fingerprint contacts a sensing electrode
Data Source
AI summary
A sensor for increasing security using biometric data, a mobile device including the same, and an authentication method of the mobile device are provided. The sensor includes a fingerprint sensor configured to detect fingerprint data of a user contacting a fingerprint acquisition region, a plurality of electrodes, and a bio sensor connected to the electrodes to detect at least one type of biometric data. A first electrode among the electrodes is located such that a finger of the user contacts the first electrode when the finger of the user is in contact with the fingerprint acquisition region.