2022 Fiscal Year Final Research Report

Elucidating the origin of biometric authentication based on the acoustic characteristics of the ears with high resolution 3D MRI

Research Project

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Project/Area Number	19H04112
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 60070:Information security-related
Research Institution	Nagaoka National College of Technology
Principal Investigator	Yano Shouhei 長岡工業高等専門学校, 電気電子システム工学科, 教授 (90332006)
Co-Investigator(Kenkyū-buntansha)	南部功夫長岡技術科学大学, 工学研究科, 准教授 (40553235) 児玉直樹新潟医療福祉大学, 医療技術学部, 教授 (50383146) 和田安弘長岡技術科学大学, 工学研究科, 理事・副学長 (70293248)
Project Period (FY)	2019-04-01 – 2023-03-31
Keywords	バイオメトリクス / 耳音響認証
Outline of Final Research Achievements	We have proposed an ear acoustics authentication method as a new way to ensure trust (reliability) in the information society. We have managed to secure domestic patents as well as an international patent in the United States. In the ear acoustics authentication method, we have studied the mechanism by which individual differences occur in the ear acoustic characteristics, which are the features of personal authentication. We conducted experimental investigations into the relationship between differences in shape captured by 3D MRI and an ear canal shape scanner, and the features of ear acoustic authentication. This is aimed at clarifying the origins of ear acoustic authentication. As a result of the research, it was found that the shape of the external ear canal is a significant feature for individual identification in ear acoustic authentication. These findings were published in a paper and presented internationally.
Free Research Field	バイオメトリクス
Academic Significance and Societal Importance of the Research Achievements	電子決済や電子認証等、インターネットを通じて買い物や資産の管理が行われている。顔の見えないネット社会において信頼性（トラスト）を確保する手段には、生体認証が必須となると考えられる。本研究成果はイヤホンを耳に付けることで、本人認証を行う画期的な耳音響認証技術である。耳音響認証の社会実装に向け、個人毎に音響的な差異を発生させるメカニズムについてMRIや外耳道形状スキャナ等を用いて解明を試みた。研究の結果、外耳道形状の異なりにより耳音響認証の特徴量である音響特性に個人毎の差異が発生する可能性が高いことが分かった。これらの研究成果は論文投稿し国際的に発表を行った。