Capacitive Touch Authentication via Pin Pattern and Sound Signal

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Solution Overview

Problem

Existing ink pad authentication methods provide low security, are easily replicable, and are not suitable for dematerialized document processes, requiring a more secure and efficient authentication solution that preserves simplicity of use.

Innovation Solution

An authentication device with conductive and insulating pins arranged on a capacitive touch screen, emitting a sound signal upon pressure detection, combining pattern recognition with sound authentication to ensure secure and unique authentication on electronic devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional ink pad authentication is used, then the device is simple to operate, but the security level is very low and the pattern is easily reproduced

Engineering Contradiction:

Improveauthentication securityVSAvoiddevice structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The authentication device is segmented into multiple pins with different materials (conductive and insulating) arranged in a specific pattern. This segmentation allows the capacitive touch screen to detect the unique pattern of conductive pins while maintaining physical contact authentication, thereby improving security without significantly increasing device complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different pins in the authentication device have different local qualities - some are made of conductive material while others are made of insulating material. This local differentiation enables the system to detect specific patterns through capacitive coupling, enhancing authentication security while keeping the overall device structure relatively simple.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If traditional ink pad authentication is used, then the process is simple, but it is not suitable for dematerialized document processes and requires scanning

Engineering Contradiction:

Improvecompatibility with dematerialized processesVSAvoidauthentication time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The traditional mechanical ink transfer authentication is replaced with an electronic capacitive detection system. The authentication device uses conductive pins that interact with the capacitive touch screen, enabling direct electronic authentication without the need for physical ink stamps and subsequent scanning, thus improving adaptability to dematerialized processes and reducing time loss.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If conductive pins are used for pattern detection, then security is enhanced, but the risk of screen damage increases

Engineering Contradiction:

Improvepattern detection accuracyVSAvoidscreen damage risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The authentication device incorporates a flexible protective layer or housing that allows the conductive pins to make contact with the capacitive touch screen without risking damage. The flexible structure enables the pins to conform to the screen surface while maintaining electrical contact for accurate pattern detection, thus resolving the contradiction between security enhancement and screen protection.

Inventive Principle:

Principle #30Flexible shells and thin films

4Reliability

If multiple pins with different materials are used, then authentication security is improved, but the manufacturing complexity increases

Engineering Contradiction:

Improveauthentication uniquenessVSAvoidpin arrangement complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The authentication device uses a standardized array of pins where each pin can serve multiple functions - conductive pins for pattern detection, insulating pins for structural support and spacing. This multi-functional design simplifies manufacturing by using a uniform pin structure with varying material properties rather than requiring completely different components, thus improving authentication uniqueness while maintaining ease of manufacture.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 requiring physical contact and pattern detection, preventing unauthorized access and ensuring only the intended device can authenticate, while being flexible and non-damaging to screens.

Implementation Method 1

The pins made of a conductive material allow detection, by a capacitive touch screen of an electronic device, of a pattern associated with the arrangement of said conductive pins

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

a means for detecting a pressure exerted on at least one pin

Methodology Applied

Scientific EffectPressure: Pressure Increase

Data Source

PatentEP3365826B1Touch and sound authentication device

Publication Date: 2021.08.04 BYSTAMP

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AI summary

The invention relates to an authentication device for using with an electronic device comprising a capacitive touch screen and a receiver, the authentication device being characterised in that it comprises a plurality of pins arranged on the same face of the authentication device, at least two pins consisting of a conductive material and the other pins consisting of an insulating material, means for detecting pressure exerted on at least one pin, and means for emitting an authentication signal to be received by the receiver when pressure is detected.