Acoustic Access Code Transmission for Secure Wireless Authentication

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Solution Overview

Problem

Current wireless protected setup (WPS) methods are vulnerable to unauthorized access, as they rely on physical buttons and are not secure for transmitting network passphrases, which can be exploited by unauthorized devices to gain access to wireless networks.

Innovation Solution

The method involves encoding network access codes into sound waveforms and transmitting them using signal-to-noise ratios, eliminating the need for physical buttons by utilizing voice-user interfaces to initiate authentication, ensuring secure transmission and minimizing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If WPS transmits passphrases using physical buttons and broadcast methods, then device connectivity is simplified, but network security is compromised due to vulnerability to unauthorized access

Engineering Contradiction:
Improvedevice connectivityVSAvoidnetwork security
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent introduces sound waveforms as an intermediary medium to transmit passphrases. Instead of direct physical button interaction or unencrypted broadcast, the passphrase is encoded into acoustic signals that require specific decoding capabilities, creating a secure transmission channel that maintains ease of operation while improving security

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical button-pressing system with an acoustic signal transmission system. The physical interaction of pressing buttons to share passphrases is substituted with voice commands and sound waveform transmission, eliminating the security vulnerabilities of the mechanical system while maintaining user-friendly operation

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If sound power level is increased to ensure passphrase transmission, then transmission reliability improves, but power consumption increases

Engineering Contradiction:
Improvepassphrase transmissionVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic adjustment of sound power levels based on transmission conditions. The system monitors transmission success and adjusts the acoustic signal strength accordingly, using higher power only when necessary to ensure reliable passphrase delivery while minimizing power consumption during successful transmissions

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the parameters of the sound waveform including power level, frequency, and duration based on transmission requirements. By optimizing these parameters dynamically, the system achieves reliable passphrase transmission while minimizing energy expenditure, adapting to different environmental conditions and receiver distances

Inventive Principle:
Principle #35Parameter changes

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

This approach enhances network security by physically isolating devices and securely transmitting passphrases, reducing power usage while preventing unauthorized access through incremental signal power adjustments and voice recognition for authentication.

Implementation Method 1

generating a sound waveform that includes an access code of an access point, by encoding the access code into the sound waveform

Methodology Applied
Scientific EffectSound waveform encoding: Phase Modulation

Data Source

PatentUS11388596B2Secure transmittal of wireless local area network access codes
Publication Date: 2022.07.12 INTERNATIONAL BUSINESS MACHINE CORPORATION
  • US11388596B2 patent drawing
  • US11388596B2 patent drawing
  • US11388596B2 patent drawing

AI summary

Aspects of the present invention disclose a method for encoding and transmitting access codes of a network to a computing device that is attempting to access the network. The method includes one or more processors identifying an audio command received by a first computing device. The method further includes generating a sound waveform that includes an access code of an access point, by encoding the access code into the sound waveform. The method further includes defining a sound power level of the sound waveform. The method further includes transmitting the sound waveform. The method further includes determining whether a second computing device receives the access code that is encoded in the sound waveform.