Mobile Device Authentication via Piezoelectric Force Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mobile device authentication methods are vulnerable to pattern recognition by others, requiring complex operations to hide finger motions, which complicates the authentication process.
Innovation Solution
A mobile device with a housing that includes sensors to detect pressing patterns on multiple surfaces, using a piezoelectric film to deform in response to pressing force, allowing authentication by varying the force applied over time without moving the finger, and a function restricting unit to enable operations only when the correct pattern is entered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional authentication methods using key input units or touch panels are used, then authentication can be performed, but finger motion can be observed by others allowing pattern recognition
Solution Approach 1:
The patent replaces the mechanical key input system and touch panel interaction with a sensor-based detection system that measures pressing force and time intervals. This substitution eliminates the need for visible finger motions across the device surface, allowing authentication through subtle pressing actions that leave no observable trace, thus resolving the contradiction between security and operational simplicity
Solution Approach 2:
The patent introduces sensors as an intermediary between the user's finger and the authentication system. Instead of directly observing finger motion on keys or touch panels, the sensors detect pressing force and timing characteristics, creating an indirect measurement mechanism that prevents pattern recognition while maintaining authentication functionality
2Reliability
If operators hide their finger motions to prevent pattern recognition, then security is improved, but the authentication operation becomes more complicated
Solution Approach 1:
The patent enables the authentication system to automatically detect and analyze pressing patterns without requiring the user to perform additional protective actions. The sensors continuously monitor pressing force and timing, automatically extracting authentication-relevant features, thus eliminating the need for users to consciously hide their motions or perform complex protective maneuvers
3Measurement precision
If sensors detect pressing force at multiple time instants, then authentication accuracy is improved, but additional timing indication mechanisms are required
Solution Approach 1:
The patent integrates multiple functions into the existing display and audio systems. The display serves both as the user interface and as the timing indication mechanism, showing both the game content and the timing cues. The audio system similarly provides both game feedback and timing notifications, eliminating the need for separate dedicated timing indication hardware
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
Enhances security by preventing pattern recognition and simplifying the authentication process, allowing operators to authenticate by changing force on the device's surfaces without exposing finger motion, thus maintaining privacy and ease of use.
Implementation Method 1
The sensor preferably includes a piezoelectric film which deforms in response to the pressing operation of the operator
Data Source
AI summary
A mobile device includes a housing, a sensor and a deformation detecting IC which detect deformation of the housing, a memory which stores a pattern database in which patterns of the deformation of the housing are registered in advance, and an authentication unit which performs authentication based on whether or not the deformation of the housing detected by the sensor and the deformation detecting IC corresponds to a pattern registered in the pattern database.