基于差分直方图统计特性的MIDI音频隐写分析  

Steganalysis in MIDI audio based on difference histogram

作　　者：杨帆[1] 郭立[1] 王翠平[1] 王昱洁[1] 徐雷[1] 韩琼磊[1] 高路[1] 

机构地区：[1]中国科学技术大学电子科学与技术系,安徽合肥230027

出　　处：《中国科学技术大学学报》2010年第8期801-806,共6页JUSTC

基　　金：国家自然科学基金(60772032)资助

摘　　要：为了保障网络信息安全,提出了一种以MIDI音频作为载体的LSB信息隐藏算法的专用隐写分析方法,通过提取MIDI音频中的力度分量,考察相邻力度值之间的差分值分布,根据差分直方图统计特性,对嵌入容量进行估计.通过理论推导,在MIDI音频中密写信息会改变力度值统计特性.实验表明,当嵌入容量超过10%时,基于差分直方图统计特性的MIDI音频隐写分析方法可以100%检测出带有密写信息的MIDI音频.To protect the security of information networks, a audio steganalysis algorithm in MIDI audio by LSB was proposed. The algorithm picked up the parameter of music velocity, studied adjacent velocity difference between the value of the score distribution and estimated the rate that hide information in MIDI files based on the statistical difference histogram features. As a theoretical derivation, hiding information in the MIDI audio was bound to change the statistical characteristics of music velocity. Experiments show that when the embedded rate is more than 10%, steganalysis in MIDI audio based on difference histograms can detect MIDI audio with 100% accuracy.

关 键 词：差分直方图 MIDI 隐写分析 ROC曲线 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]