多媒体取证

多媒体取证是信息安全领域的重要研究内容之一，主要应用于司法取证、刑侦取证，是电子证据鉴别等领域中的关键技术之一．目前篡改媒体内容大量涌现，严重危及个人隐私与社会稳定，多媒体取证已成为一项迫切需求的技术．本文概要介绍了多媒体取证技术的特点和原理，并且从媒体源辨识、内容篡改检测、处理历史分析、反取证四方面阐述多媒体取证的发展现状和趋势，分析了各种取证技术所面临的难点．最后展现了未来技术发展的若干问题与可能趋势．

Multimedia forensics

Multimedia forensics is an important research area of information security, as well as a key technology of digital evidence authentication. Nowadays multimedia materials can be doctored very easily by pervasive editing software. A series of issues will arise if those fake multimedia materials are published, such as copyright of digital media, protection of personal privacy, social security, and so on. Thus examining the authenticity and integrity of digital media is of great significance. In the paper the characteristics and principles of multimedia forensics technology are introduced. Four important research topics of multimedia forensics, media source identification, tampering detection, processing history analysis, antiorensics, are reviewed and summarized with related fundamental science and technology research progress. Finally the potential future trends of multimedia forensics are discussed.