Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Steganography on Android Smart Devices

안드로이드 스마트기기에서의 스테가노그래피 연구

  • Jung, Ki-Hyun (Department of Cyber Security, Kyungil University) ;
  • Lee, Joon-Ho (6th R&D Institute, Agency for Defense Development) ;
  • Yoo, Kee-Young (School of Computer Science and Engineering, Kyungpook National University)
  • 정기현 (경일대학교 사이버보안학과) ;
  • 이준호 (국방과학연구소 제6기술연구본부) ;
  • 유기영 (경북대학교 컴퓨터공학부)
  • Received : 2014.08.27
  • Accepted : 2015.03.05
  • Published : 2015.04.25
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Abstract

As increasing the use of smart phones, the interest of iOS and Android operating system is growing up. In this paper, a novel steganographic method based on Android platform is proposed. Firstly, we analyze the skia based image format that is supporting 2D graphic libraries in Android operating system. Then, we propose a new data hiding method based on the Android bitmap image format. The proposed method hides the secret data on the four true color areas which include Alpha, Red, Green, Blue. In especial, we increase the embedding capacity of the secret data on the Alpha area with a less image distortion. The experimental results show that the proposed method has a higher embedding capacity and less distortion by changing the size of the secret bits on the Alpha area.

스마트폰 사용의 확대로 iOS와 Android 운영체제에 대한 관심이 높아지고 있다. 본 논문에서는 안드로이드 플랫폼을 기반으로 한 스테가노그래픽 기법으로 안드로이드에서 기본적으로 제공하는 그래픽 라이브러리인 스키아를 기반으로 한 영상 포맷을 분석하고, 분석된 포맷에 기반한 알고리즘을 제안한다. 제안하는 알고리즘은 Alpha, Red, Green, Blue 각각 8비트씩 총 32비트를 사용하는 트루 칼라를 기반으로 네 개의 각 8비트 영역을 활용하여 비밀자료를 숨긴다. 또한 이미지 왜곡이 덜 민감한 Alpha 영역을 활용하여 최대한 비밀자료를 숨길 수 있도록 알고리즘을 제안함으로써, 안드로이드를 기반으로 하는 스마트기기에 모두 사용이 가능할 것으로 보인다. 실험결과에서는 Alpha값의 변화에 따른 비밀자료 삽입용량과 이미지 왜곡 정도를 보임으로써 제안하는 알고리즘의 우수성을 증명하고 있다.

Keywords

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