Multiple Print Unlock for Touchscreen Security
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Solution Overview
Problem
Existing portable computing devices often inadvertently unlock when handled, due to the reliance on single fingerprint or thumbprint scanning, leading to security and usability issues.
Innovation Solution
Implementing a multiple print unlock system that requires a user to provide a sequence of fingerprints or thumbprints to unlock the device after it has been inactive for a predetermined time, with options for custom templates and hint features to assist in correct entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single fingerprint or thumbprint scanner is used to unlock the device, then the unlocking process is simple and quick, but the device may be inadvertently unlocked when handled
Solution Approach 1:
The patent divides the single print verification into multiple print verifications. Instead of relying on one fingerprint or thumbprint, the system requires a sequence of multiple prints (e.g., three prints) to be placed on the touchscreen in succession. This segmentation of the authentication process reduces the probability of accidental unlocking while maintaining ease of use, as the multiple prints are quickly captured in sequence without requiring complex user actions.
2Reliability
If multiple prints are required to unlock the device, then authentication security is improved, but the unlocking process becomes more complex
Solution Approach 1:
The system performs preliminary actions by automatically detecting and capturing multiple prints in quick succession without requiring the user to manually initiate each capture. The touchscreen continuously monitors for print placements and automatically sequences them, reducing the perceived complexity for the user. The system prepares the authentication sequence in advance by capturing prints as they naturally occur during normal handling.
Solution Approach 2:
The system serves itself by automatically managing the multiple print capture and verification process without requiring user intervention beyond placing prints on the screen. The touchscreen itself performs the scanning, sequencing, and verification functions, eliminating the need for separate scanners or complex user interactions. This self-service approach maintains simplicity while implementing security.
3Measurement precision
If multiple prints are scanned using a dedicated scanner, then print detection accuracy is improved, but the device structure becomes more complex
Solution Approach 1:
The patent applies the universality principle by using the touchscreen display for multiple functions: it serves as both the user interface for interaction and the scanning device for fingerprint/thumbnail detection. The touchscreen capacitively senses the electrical properties of human skin when placed on the screen, enabling print detection without dedicated hardware scanners. This multi-functional use of the touchscreen maintains device simplicity while achieving accurate print detection.
Data Source
AI summary
In some examples, a computing device may display a user interface (UI) to configure a multiple print unlock. The UI may determine a first plurality of prints placed on a touchscreen. Individual prints of the first plurality of prints may include a thumb print or a fingerprint. After the computing device has been inactive for a predetermined amount of time, the UI may lock the computing device. The UI may determine a second plurality of prints placed on a touchscreen and perform a comparison of the second plurality of prints to the first plurality of prints. If the UI determines that the second plurality of prints matches the first plurality of prints, then the UI may unlock the computing device. If the UI determines that the second plurality of prints does not match the first plurality of prints, then the computing device may remain locked.