计算机工程与应用 ›› 2012, Vol. 48 ›› Issue (10): 115-119.

• 网络、通信、安全 • 上一篇    下一篇

改进的Markov和联合密度特征的MP3隐写分析方法

吴福宝,谢春辉,梅  珂   

  1. 中国科学技术大学 电子科学与技术系 计算机视觉实验室,合肥 230027
  • 出版日期:2012-04-01 发布日期:2012-04-11

Steganalysis for MP3 based on modified Markov and joint density features

WU Fubao, XIE Chunhui, MEI Ke   

  1. Lab of Computer Vision, Department of Electronic Science & Technology, University of Science & Technology of China, Hefei 230027, China
  • Online:2012-04-01 Published:2012-04-11

摘要: 提出了一种 MDCT(修正的离散余弦变换)域的MP3隐写分析方法。该方法通过改进的Markov特征集和联合密度特征集提取出MDCT系数的特征,经过方差分析选择有效的特征用于支持向量机(SVM)的训练与检测。实验结果表明,与以往方法相比提高了对MP3Stego的检测率,能有效地检测常见的MDCT系数修改的MP3信息隐藏方法。

关键词: MP3, 修正的离散余弦变换(MDCT)系数, Markov, 联合密度, 信息隐藏, 隐写分析

Abstract: A steganalysis method in MP3 based on MDCT features is proposed. The original Markov and joint density features are expanded to the inter-frame and intra-frame of MDCT coefficients. By selecting the effective features by ANOVA, Support Vector Machine(SVM) is used to distinguish between cover MP3 and stego-MP3. Experimental results show the reasonable improvement of detection performance of MP3Stego and successful detection of the existence of the secret data in MP3 audio for MDCT modification.

Key words: MP3, Modified Discrete Cosine Transform(MDCT) coefficients, Markov, joint density, information hiding, steganalysis