실용적 뇌파 기반 사용자 인증을 위한 단일 채널 EEG 측정 장비를 통해 수집된 EEG 샘플의 점진적 제거 방법
An Incremental Elimination Method of EEG Samples Collected by Single-Channel EEG Measurement Device for Practical Brainwave-Based User Authentication
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초록
뇌파 기반 사용자 인증기술은 최근에 스마트폰, 금융 등 다양한 분야에서 사용되고 있는 지문인식 등의 기존 생체인식인증기술과 비교해볼 때 가변성, 유출 저항성 등의 장점이 있다. 이러한 장점에도 불구하고 사용자로부터 인증에 필요한뇌파를 수집하기 위해 필요한 장비의 경제성과 뇌파 수집 행위의 편의성 문제 때문에 뇌파 기반 사용자 인증기술이 실제환경에서 사용되지는 못했다. 최근 하드웨어 기술의 발전으로 휴대성과 통신 기능을 갖춘 간소화 된 형태의 뇌파 수집기기들의 개발로 인해 뇌파를 활용한 인증기술에 대한 관련 연구가 활발히 진행되어왔다. 그러나 본 논문에서 가장 간소화된 형태인 단일 채널 뇌파 측정기기를 통해 수집된 뇌파 샘플들을 대상으로 수행된 실험에 따르면 뇌파 수집 채널 수감소에 따라 인증정확도의 감소 현상이 있는 것으로 파악되었다. 따라서 본 논문에서는 뇌파 기반 사용자 인증기술의 실용화를 위해 해결해야 할 기술적 문제점에 대해 분석하고 이를 위해서 점진적 뇌파 샘플 제거 방법을 통해 각 사용자의인증에 유효한 뇌파 샘플 집합을 구성하는 방법을 제안한다.
Abstract
Brainwave-based user authentication technology has advantages such as changeability, shoulder-surfing resistance, and etc. comparing with conventional biometric authentications, fingerprint recognition for instance which are widely used for smart phone and finance user authentication. Despite these advantages, brainwave-based authentication technology has not been used in practice because of the price for EEG (electroencephalography) collecting devices and inconvenience to use those devices. However, according to the development of simple and convenient EEG collecting devices which are portable and communicative by the recent advances in hardware technology, relevant researches have been actively performed. However, according to the experiment based on EEG samples collected by using a single-channel EEG measurement device which is the most simplified one, the authentication accuracy decreases as the number of channels to measure and collect EEG decreases. Therefore, in this paper, we analyze technical problems that need to be solved for practical use of brainwave-based use authentication and propose an incremental elimination method of collected EEG samples for each user to consist a set of EEG samples which are effective to authentication users.
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