Head Echo Acoustic Personal Authentication Device
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Solution Overview
Problem
Existing biometric authentication methods require users to perform operations such as placing their fingers on scanners or turning their faces towards cameras, resulting in psychological and physical burdens. Additionally, these methods struggle to continuously authenticate users, leading to a low security level when user replacement is not detectable.
Innovation Solution
A personal authentication device that transmits a first acoustic signal to a part of the user's head, observes the signal after it has propagated through the head, calculates acoustic characteristics, extracts a feature amount related to the user, and registers this feature for identification. The device continuously authenticates users by transmitting the acoustic signal at predetermined intervals when the user is identified as being identical.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biometric authentication is performed at a predetermined place or time using methods like fingerprint or face recognition, then authentication can be performed with dedicated devices, but users are forced to perform operations (placing finger on scanner, turning face to camera) resulting in psychological and physical burden
Solution Approach 1:
The system performs authentication automatically without requiring user operations. The acoustic signal is transmitted to the user's head and the echo is captured automatically, eliminating the need for users to place fingers on scanners or turn their faces to cameras. The authentication process serves itself by utilizing the user's natural head position and acoustic properties.
Solution Approach 2:
The patent replaces mechanical contact-based authentication (fingerprint scanners, face cameras requiring specific positioning) with an acoustic field-based system. The acoustic signal propagates through the user's head and the echo characteristics are analyzed, substituting mechanical interaction with acoustic field interaction that requires no user operation.
2Productivity
If biometric authentication is performed at a predetermined place or time, then authentication can be completed with specific operations, but it is difficult to continuously authenticate users at all times, resulting in low security level when user replacement is not detectable
Solution Approach 1:
The system enables continuous authentication by repeatedly transmitting acoustic signals and analyzing echo characteristics at predetermined intervals. Once a user is authenticated, the system continues to monitor by periodically sending acoustic signals and comparing the returned echoes, maintaining continuous verification of user identity without interrupting the user's activities.
3Ease of manufacture
If acoustic characteristics are used for personal authentication, then authentication can be performed with general-purpose inexpensive devices, but acoustic characteristics need to be stored in a robust storage device in advance
Solution Approach 1:
The system creates a copy of the user's acoustic characteristics (echo pattern) during initial authentication and stores it for future comparisons. This copied acoustic signature allows rapid subsequent authentications without requiring complex real-time analysis, reducing both device cost and storage complexity.
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 solution simplifies security measures with minimal psychological and physical burden on users, providing continuous authentication and a high security level by utilizing internal acoustic characteristics that are difficult to leak or forge.
Implementation Method 1
a transmission means for transmitting a first acoustic signal to a part of a head of a user; an observation means for observing a second acoustic signal that is an acoustic signal after the first acoustic signal propagates through the part of the head of the user
Data Source
AI summary
Provided is a personal authentication device capable of simply securing security with little psychological and physical burden of a user to be authenticated. Personal authentication device includes: transmission unit that transmits a first acoustic signal to a user's head; observation unit that observes a second acoustic signal after the first acoustic signal propagation; calculation unit that calculates acoustic characteristics from the first and the second acoustic signal; extraction unit that extracts a feature amount related to a user from the acoustic characteristics; storage control unit that registers the feature amount in the storage unit; identification unit that identifies the user by collating the first feature amount with a second feature amount; and storage unit stores the first feature amount, wherein while identification unit identifies the user as being identical, transmission unit transmits the first acoustic signal every predetermined interval.