타인의 접근제어를 위해 사용하는 스마트폰 인증은 스마트폰 사용 시 마다 다양한 방법으로스마트폰 소유자의 여부를 확인한다. 그러나 이러한 빈번한 인증은 사용자들의 불편함을 야기하며, 때로는인증방법을 사용하지 않게 하는, 궁극적으로 스마트폰 보안의 치명적인 문제로 작용한다. 본 논문에서는이러한 문제들을 해결하고 사용자들의 보안인증 사용을 촉진하여 보안성을 증대시키기 위한 안드로이드플랫폼 기반의 지속인증 모델을 제안한다. 제안 모델은 스마트폰의 현 상황위험도를 측정, 그에 맞추어 적절한 인증 수단을 결정, 적용하며, 낮은 위험도 수준일 경우 인증을 수행하지 않아 사용자의 가용성을 높여준다. 상황위험도를 정의하기 위해 설문조사를 이용하였으며, 설문결과를 연령, 위치, 장소, 행동 등으로세분화하여 분석하였다. 본 연구 결과의 시연을 위해 정의된 상황위험도와 보안인증수단과의 관계를 시각화하여 보여줄 수 있도록 시연프로그램을 구현하였다.
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