Fingerprint Registration via Touch Intensity Verification
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Solution Overview
Problem
Existing fingerprint authentication systems can be compromised when fingerprint information is registered using a finger in contact with foreign objects, leading to weakened security and potential unauthorized access.
Innovation Solution
A method for updating fingerprint information in an electronic device, where the update is based on a touch input from a finger not in contact with a foreign object, determined by the intensity of the user's touch input on a display module, and authenticated using a fingerprint sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fingerprint registration is performed without touch intensity verification, then the ease of operation is improved, but the reliability of fingerprint authentication deteriorates due to potential foreign object interference
Solution Approach 1:
The patent applies parameter changes by introducing touch intensity as a verification parameter during fingerprint registration. The processor compares the intensity of the touch input against a predetermined threshold to determine whether to proceed with fingerprint registration. This additional parameter verification ensures that only genuine finger touches (with sufficient intensity) can register fingerprints, thereby preventing foreign objects from compromising authentication security while maintaining ease of operation for legitimate users.
2Reliability
If touch intensity threshold verification is implemented, then the reliability of fingerprint authentication is improved, but the device complexity increases due to additional verification steps
Solution Approach 1:
The patent utilizes the multi-functionality of the existing touch sensor to serve dual purposes: both detecting touch input for normal device operation and verifying touch intensity for fingerprint registration security. The same touch sensor infrastructure is leveraged to provide an additional security layer without requiring separate hardware components, thereby improving reliability while minimizing the increase in device complexity.
3Reliability
If foreign object detection through touch intensity is applied, then the reliability is improved, but the ease of operation deteriorates due to stricter authentication requirements
Solution Approach 1:
The patent applies partial action by implementing touch intensity verification only during the fingerprint registration process, not during all fingerprint authentication operations. This selective application ensures that the additional verification step is applied where it is most critical (during registration when security risks are highest) while maintaining simplicity for subsequent authentication operations, thus improving registration accuracy without excessively impacting overall ease of operation.
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
This solution enhances the security of fingerprint authentication by ensuring that only genuine fingerprint information is registered, thereby preventing unauthorized access and improving the reliability of fingerprint-based security systems.
Implementation Method 1
The electronic device may obtain a fingerprint of a finger using a fingerprint sensor disposed at a location corresponding to at least a partial region of the display module
Implementation Method 2
obtain a fingerprint image through the fingerprint sensor
Implementation Method 3
obtain a first touch input of a user to the display module through the touch sensor
Data Source
AI summary
In an embodiment, an electronic device may include a fingerprint sensor, a display module including a touch sensor, and at least one processor operatively connected to the fingerprint sensor and the display module. The at least one processor may be configured to obtain a first touch input of a user to the display module through the touch sensor. The at least one processor may be configured to perform authentication for the user based on a fingerprint image and registered fingerprint information, the fingerprint image being obtained through the fingerprint sensor when the first touch input is obtained. The at least one processor may be configured to identify, based on the authentication for the user being successful, whether the fingerprint image satisfies a first condition for updating the registered fingerprint information. The at least one processor may be configured to identify whether an intensity of the first touch input is greater than or equal to a threshold intensity set for determining whether a touch input to the display module is inputted by the user's finger that is not in contact with a foreign material. The at least one processor is configured to update the registered fingerprint information using the fingerprint image based on identifying that the fingerprint image satisfies the first condition and that the intensity of the first touch input is equal to or greater than the threshold intensity.