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总览 评价 羊开云 , 王让定 * , 严迪群 , 金超 ( 宁波大学信息科学与工程学院, 浙江 宁波 315211; ) 摘要: MP3stego是典型的音频信息隐写工具,能够将要传递的秘密信息通过加密压缩后,隐写于音频编码过程产生的参数中,从而实现密文信息隐写。然而目
羊开云, 王让定*, 严迪群, 金超
(
宁波大学信息科学与工程学院, 浙江 宁波 315211; )
摘要:
MP3stego是典型的音频信息隐写工具,能够将要传递的秘密信息通过加密压缩后,隐写于音频编码过程产生的参数中,从而实现密文信息隐写。然而目前针对MP3stego提出的多是被动隐写检测方法,本文对该工具进行主动隐写分析,结合突变点检测技术和排列组合方法对嵌入密文长度进行估计。实验证明,该方法能有效估计出嵌入MP3stego的密文长度,估计的与实际的密文长度平均偏差仅为1.443%。
关键词:
MP3stego;音频;主动隐写分析;突变点检测
YANG Kaiyun, WANG Rangding*, YAN Diqun, JIN Chao
(
College of Information Science & Engineering, Ningbo, Zhejiang 315211; )
Abstract:
MP3stego is a typical steganographic tool for audios which can hide the compressed and encrypted secret information into the parameters produced in the audio coding process. However, most of the steganalysises of MP3stego are about passive steganalysises. In this paper, an active steganalysis technique has been proposed. It is based on the changing point analysis combined with the method of permutation and conbination. The purpose of the technique is to estimate the true length of the embedded messages. Experiments indicate that the technique is effective, the average deviation between the truth length and the estimated length is only 1.443%.
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