Mobile Device Authentication Key Generation via Motion Patterns

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Solution Overview

Problem

Existing methods for secure wireless communication between mobile devices often require complex authentication processes, such as passwords or PIN codes, which can be cumbersome and insecure.

Innovation Solution

A method for generating a data authentication key using a shared physical or mechanical condition detected by sensors like accelerometers or microphones, eliminating the need for passwords, where both devices are authenticated through a pattern of movement or sound, generating unique keys for secure bidirectional communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional authentication methods using passwords or PIN codes are used, then security can be established, but the operation becomes cumbersome and user-friendly experience deteriorates

Engineering Contradiction:

Improveauthentication securityVSAvoidauthentication process

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the mechanical input system (keyboard entry of passwords/PIN codes) with a sensor-based detection system that automatically captures physical actions. Accelerometers, gyroscopes, and other sensors detect motion patterns, taps, or gestures to generate authentication keys, eliminating the need for manual code entry while maintaining security.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service authentication where the user's natural physical actions (movements, taps, gestures) automatically generate the authentication key without requiring the user to consciously create or enter a code. The device itself captures and processes the physical action to produce the authentication credential.

Inventive Principle:

Principle #25Self-service

2Reliability

If complex authentication protocols are implemented, then security level increases, but device complexity and processing requirements increase

Engineering Contradiction:

Improveauthentication securityVSAvoidauthentication system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the authentication credential generation process from complex protocol exchanges and embeds it directly within the mobile device itself. Each device independently generates its own authentication key from its detected physical actions, eliminating the need for complex mutual authentication protocols between devices.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system changes the parameter basis for authentication from static secret values (passwords, PINs) to dynamic physical action parameters. By using accelerometers, gyroscopes, and other sensors to capture motion characteristics, the system creates authentication keys based on variable physical parameters that are inherently secure and easy to implement.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If shared physical conditions are used for key generation, then ease of operation improves, but reliability may be compromised if detection is inaccurate

Engineering Contradiction:

Improveauthentication processVSAvoidauthentication accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent moves authentication from a one-dimensional input (keyboard entry) to multi-dimensional physical space detection. Accelerometers capture acceleration vectors in three dimensions, gyroscopes detect rotational orientation, and other sensors capture spatial-temporal characteristics of physical actions, creating a high-dimensional authentication space that is both easy to interact with and highly reliable for verification.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

Provides a user-friendly and highly secure method for pairing mobile devices without passwords, ensuring secure data communication by using detected motion or sound patterns to create authentication keys.

Implementation Method 1

detecting, in said first mobile device, said condition; wherein said condition is detected in the form of a pattern of movement based on an output signal from an accelerometer

Methodology Applied

Scientific EffectAccelerometer detection: Accelerometer

Implementation Method 2

detecting said condition in the form of knocking, tapping or similar on the mobile devices based on an output signal from a microphone

Methodology Applied

Scientific EffectAcoustic detection: Sound

Data Source

PatentUS9253633B2Method and mobile device for generating a data authentication key

Publication Date: 2016.02.02 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The invention relates to a method for generating a data authentication key for allowing data communication over a wireless channel between a first mobile device and a second mobile device, comprising: associating said mobile devices to each other by means of said key. The invention comprises: allowing a shared physical or mechanical condition to be applied generally simultaneously upon said devices; detecting, in said first mobile device, said condition; defining, in said first mobile device, said authentication key based on the detected condition; and transmitting said key to said second mobile device. The invention also relates to a mobile device configured for generating a data authentication key for allowing data communication over a wireless channel to a further mobile device.