Journal of KIISE:Computing Practices and Letters (한국정보과학회논문지:컴퓨팅의 실제 및 레터)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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Implementation of StegoWaveK using an Improved Lowbit Encoding Method

개선된 Lowbit Encoding 방법을 이용한 StegoWavek의 구현

  • Published : 2003.08.01
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Abstract

The steganography is one of methods that users can hide data. Some steganography softwares use audio data among multimedia data. However, these commercialized audio steganography softwares have disadvantages that the existence of hidden messages can or easily recognized visually and only certain-sized data can be hidden. To solve these problems, this study suggested, designed and implemented Dynamic Message Embedding (DME) algorithm. Also, to improve the security level of the secret message, the file encryption algorithm has been applied. Through these, StegoWaveK system that performs audio steganography was designed and implemented. Then, the suggested system and the commercialized audio steganography system were compared and analyzed on criteria of the Human Visilable System (HVS), Human Auditory System (HAS), Statistical Analysis (SA), and Audio Measurement (AM).

멀티미디어 데이타중에서 오디오데이타를 이용한 상용화된 오디오 스테가노그라피(audio steganography) 소프트웨어들은 시각적인 측면에서 비밀 메시지가 은닉되어 있다는 것을 쉽게 인지할 수 있다는 것과 숨길 정보의 크기에 제한이 있다는 문제점을 가지고 있다. 이러한 문제점을 해결하기 위해 동적으로 메시지를 은닉하는 방법을 제안하였다. 또한 비밀 메시지의 보안수준을 향상시키기 위해 파일 암호화 알고리즘도 적용하였다. 본 논문에서는 제안한 오디오 스테가노그라피를 수행해주는 StegoWaveK시스템을 상용화된 오디오 스테가노그라피 시스템의 5가지 측면으로 비교 분석하였으며, 성능면에서 우수함을 보였다. StegoWaveK는 상용화된 시스템에 비해 시각적 공격 측면이나 은닉할 메시지 크기 측면에서는 좋으나 인터페이스 측면에서는 사용자 위주의 편리성을 제공할 수 있도록 보완되어야 한다. 그리고 StegoWavek와 상용화된 시스템이 견고성이 약하다는 단점을 보완해야 하며, 다양한 멀티미디어 데이타를 이용한 스테가노그라피로의 추후연구가 필요하다.

Keywords

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