삼성 스마트폰의 음성 녹음 어플리케이션에 의해 녹음된 오디오 파일에 대한 위변조 여부 분석 방법
Forgery Analysis Method for Audio Recordings Generated by Voice Recorder Application from Samsung Smartphones
Audio recordings are used widely as crucial evidence due to the popularity of smartphones. However, the digital evidence submitted voluntarily may be questioned for its authentication. Since most smartphones provide the function of digital editing files, they could be exposed to crime as being edited maliciously. Primarily, it could be severe in the case of voluntary submission via information and communications networks. This paper proposed the forensic method for authentication of audio recordings generated by the Voice Recorder application from Samsung smartphones. First, we analyzed and compared the file structures and timestamps of audio recordings between the normal state without manipulation and the manipulated state. Then, we analyzed the spectrogram of audio recordings. Finally, by analyzing the timestamps of the media-log for audio recordings, we confirmed the authentication method for the audio recordings forensically.
목차
Abstract Ⅰ. 서론 Ⅱ. 재료 및 방법 1. Audio recordings acquisition 2. Manipulation function provided in Voice Recorder application Ⅲ. Analysis of audio recordings with normal states 1. File structure analysis 2. Spectrogram analysis 3. Media-log analysis Ⅳ. Analysis of audio recordings with manipulation 1. File structure analysis 2. Spectrogram analysis 3. Media-log analysis Ⅴ. 고찰 Ⅵ. 결론 Ⅶ. 사사 Ⅷ. 참고문헌
법과학 분야는 사회정의 구현에 있어 크나큰 가치가 있음에도 불구하고 우리나라에서는 이 분야에 대한 인식이 미흡하여 선진 외국에 비해 침체되어 있는 실정이다. 이에 우리나라에서도 법과학 분야와 관련 있는 학계, 연구기관, 수사기관 등 유관 단체들로 구성된 한국 법과학회를 창립하여 이 분야를 활성화 시켜 과학수사를 한층 더 발전시키기 위함을 목적으로 한다.