Dynamic Fingerprint Authentication via Position and Rotation Constraints
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Solution Overview
Problem
Existing large area fingerprint sensors for electronic devices lack enhanced security measures beyond mere fingerprint recognition, failing to effectively prevent spoofing and ensuring correct finger positioning.
Innovation Solution
A method that instructs users to position their fingers at specific locations with varying rotations, acquiring multiple portions of fingerprint information to authenticate based on both fingerprint matching and positional alignment, introducing unpredictability to prevent spoofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a large area fingerprint sensor is used to allow fingerprint capture anywhere on the touch screen, then user convenience and usability are improved, but security against spoofing attacks deteriorates
Solution Approach 1:
The patent applies dynamics by making the authentication requirements change during the authentication process. The system dynamically adjusts the required finger position, rotation, and pressure based on the authentication state. This prevents spoofing because a static fingerprint image cannot adapt to the changing dynamic requirements, while still allowing convenient authentication for legitimate users who can follow the dynamic instructions.
Solution Approach 2:
The patent extends authentication from the traditional 2D fingerprint pattern recognition to a 5D authentication space by adding three new dimensions: finger position (x, y coordinates), finger rotation (angular orientation), and finger pressure (force applied). This dimensional expansion creates a much more complex authentication space that is difficult to spoof while maintaining ease of use through guided instructions.
2Reliability
If multiple fingerprint parameters (position, rotation, pressure) are required for authentication, then security is improved, but device complexity and operation difficulty increase
Solution Approach 1:
The patent implements feedback by providing real-time visual guidance to the user during the authentication process. The system displays instructions indicating the required finger position, rotation, and pressure, and updates these instructions based on the detected finger state. This feedback loop simplifies the user experience while maintaining the complex multi-parameter authentication requirements, as users are guided through each parameter adjustment.
Solution Approach 2:
The patent introduces an intermediary layer (the instruction display and processing system) that mediates between the complex authentication requirements and the user. This intermediary translates the complex 5D authentication parameters into simple visual instructions, effectively hiding the system complexity from the user while maintaining high security through comprehensive parameter verification.
3Reliability
If multiple fingerprint parameters are required for authentication, then security against spoofing is improved, but operation time and user effort increase
Solution Approach 1:
The patent applies periodic action by breaking down the authentication process into distinct phases or steps. The system periodically checks different parameters (position, rotation, pressure) in sequence rather than requiring all parameters to be perfectly aligned simultaneously. This periodic verification approach maintains security while reducing the overall authentication time, as users can adjust parameters in manageable steps rather than attempting perfect alignment all at once.
Data Source
AI summary
The present disclosure relates to a method of authenticating a user by means of an electronic device comprising a user output interface. The present disclosure also relates to a corresponding electronic device and to a computer program product.