Touchless Authentication Using 3D Depth and Thermal Sensors
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Solution Overview
Problem
Existing user authentication methods in electronic devices lack robustness, particularly in preventing unauthorized access using three-dimensional masks or images, and do not provide a seamless, touchless user interface.
Innovation Solution
A touchless authentication system utilizing a combination of two-dimensional images, three-dimensional depth scans, thermal measurements, and additional factors such as facial features, movement, and device orientation to verify the authenticity of the user, preventing spoofing attempts by requiring a living, breathing person to access the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional two-dimensional image recognition is used for authentication, then the user interface is simple and quick, but the security is insufficient and vulnerable to spoofing attacks
Solution Approach 1:
The patent transitions from two-dimensional image recognition to three-dimensional depth mapping for authentication. The depth sensor captures spatial information about the user's face, creating a three-dimensional representation that cannot be replicated by flat photographs or two-dimensional masks, thereby enhancing security while maintaining a relatively simple user interface.
Solution Approach 2:
The patent changes the authentication parameters from simple two-dimensional pixel data to three-dimensional spatial coordinates and depth values. By measuring distance, elevation, and depth information, the system creates a more complex parameter set that is significantly harder to spoof while still being captured quickly by modern depth sensors.
2Reliability
If multiple authentication factors are combined to prevent spoofing, then security is enhanced, but the authentication process becomes more complex and time-consuming
Solution Approach 1:
The patent merges the depth sensing and image capture functions into a unified authentication process. The depth sensor and camera work simultaneously to capture both three-dimensional spatial data and two-dimensional visual information in a single authentication attempt, combining multiple authentication factors without requiring sequential processing that would increase authentication time.
Solution Approach 2:
The patent replaces traditional mechanical or manual authentication methods (such as physical key insertion or manual code entry) with optical and depth-sensing based authentication. This substitution allows for rapid, touchless authentication that enhances security through three-dimensional verification while reducing authentication time compared to manual methods.
3Object-affected harmful factors
If three-dimensional depth scanning is added to authentication, then protection against mask spoofing is improved, but the device complexity and cost increase
Solution Approach 1:
The patent introduces a depth sensor as an intermediary component between the user and the authentication system. This depth sensor acts as a mediator that captures spatial information without requiring direct physical contact or complex interaction, providing an additional layer of verification that is relatively simple to integrate compared to more complex biometric systems.
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 system provides a highly secure and user-friendly authentication method that effectively prevents unauthorized access by ensuring a living person is present, enhancing security beyond traditional two-dimensional image recognition.
Implementation Method 1
a thermal sensor to detect an amount of thermal energy received from the user
Data Source
AI summary
An electronic device includes a two-dimensional imager, a three-dimensional imager, and a thermal sensor. One or more processors determine whether at least one image captured by the two-dimensional imager matches a first predefined criterion, whether at least one facial depth scan captured by the three-dimensional imager matches a second predefined criterion, and whether thermal energy detected by the thermal sensor matches a third predefined criterion. Touchless authentication of a person as an authorized user of the electronic device occurs when the at least one image matches the first predefined criterion, the at least one facial depth scan matches the second predefined criterion, and the thermal energy matches the third predefined criterion. Additional security factors, such as the expression of a predefined mien, can be used as well.