Capacitive Touch Stamp Authentication via Geometrical Position
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Solution Overview
Problem
Capacitive touch screens in wireless terminals face challenges in authenticating the geometrical position relation of multiple touch units on a stamp, which is essential for unique identification and authentication, especially when the stamp is touched in any direction or position, as existing multi-touch methods are optimized for input rather than authentication.
Innovation Solution
A method and system that recognize N touch points on a capacitive touch screen using a touch stamp with N conductive touch units, where the touch units are designed to have a specific geometrical position relation, and authenticate whether the touched points match the pre-registered relation by dividing the touch stamp's flat area into partition areas and using unique codes or NFC signals for additional verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multi-touch method optimized for input is used, then ease of operation is improved, but authentication reliability deteriorates
Solution Approach 1:
The touch stamp is divided into N (N≥5) separate touch units with distinct geometrical positions. Each touch unit acts as an independent segment that contributes to the overall authentication pattern, allowing the system to distinguish between different stamps even when touched in different directions or positions on the screen.
Solution Approach 2:
Each touch stamp is designed with a unique asymmetric geometrical position relation among its N touch units. This asymmetric arrangement creates a distinctive authentication pattern that cannot be replicated by other stamps, ensuring reliable authentication while maintaining ease of use through intuitive multi-touch interaction.
2Reliability
If geometrical position relation authentication is implemented, then authentication reliability is improved, but device complexity increases
Solution Approach 1:
The system creates a digital copy or template of the unique geometrical position relation of touch units during registration. This template is stored and used for comparison during authentication, eliminating the need for complex real-time analysis and simplifying the authentication process while maintaining high reliability.
Solution Approach 2:
The geometrical position relation of touch units is pre-registered and stored as authentication data before actual use. This preliminary action establishes a reference pattern that simplifies subsequent authentication operations, reducing computational complexity during real-time verification while ensuring reliable authentication.
3Measurement precision
If stamp touch authentication is enabled, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The touch stamp serves multiple functions: it acts as both an input device for user interaction and an authentication credential for verification. The same physical object with its unique geometrical arrangement performs dual roles, simplifying the user experience while maintaining precise measurement of touch positions for authentication purposes.
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
Enables effective authentication of the stamp touch, allowing for the provision of designated services by accurately matching the geometrical position relation of the touch points with the pre-designed relation, even when touched in any direction, and ensures the uniqueness of the stamp's position and identity.
Implementation Method 1
capacitive touch screen... using a capacitance accumulated in a human body
Data Source
AI summary
There are provided a method and system for authenticating a stamp touch. The method of authenticating a stamp touch according to the invention is executed in a wireless terminal having a capacitive touch screen which supports a multi-touch, the method including, a first operation in which N touch points touching a touch stamp having N (N≥5) touch units made of a conductive material on the capacitive touch screen are recognized, a second operation in which a touch authentication condition set for authenticating a touch using the touch stamp is used to check an authentication result of a geometrical position relation of the N touch points, and a third operation in which a designated service linked with the touch stamp starts when the N touch points are authenticated.