MISC: A cracking method for audio steganography.
Misc is miscellaneous, which is information hiding, also known as information camouflage. It hides sensitive information by reducing some redundancy of the carrier, such as space redundancy, data redundancy, etc., to achieve a certain special purpose.
Information hiding breaks the thinking scope of traditional cryptography and examines information security from a completely new perspective. Compared with traditional encryption, information hiding is more concealed. In information hiding, these two technologies can be combined. The secret information is first encrypted and preprocessed, and then the information is hidden. The confidentiality of the secret information is And the effect of imperceptibility is better.
Table of contents:
MISC: A cracking method for audio steganography.
audio | waveform steganography
audio | spectrum steganography
Audio | Reverse sound steganography
Audio | LSB audio steganography
Audio | MP3 Steganography
下载工具：MP3stego
https://www.petitcolas.net/steganography/mp3stego/加密音频文件：
.\Encode.exe -E .\要隐藏信息的文件 -P 加密的密码 .\把信息隐藏在这个音频中 命名生成后的音频文件
.\Encode.exe -E .\flag.txt -P 123456 .\svega.wav svega.mp3
(这个 .\ 是在 win 下的执行程序要使用的.)
解密的音频：
.\Decode.exe -X -P 解密需要的密码 .\被加密的音频
.\Decode.exe -X -P 123456 .\svega.mp3
audio | waveform steganography
波形中隐含摩斯密码，较长的蓝色即为“-”较短的即为“.”，每一段由-和.组成的即为一个字符
打开 AUDACITY 工具，把音频文件拖进去
（1）然后把正常的声道关闭（点击音频左上角有个 X ）
（2）导出下面不正常的声道
morse2ascii 是一个从 PCM 解码 WAV 文件摩斯
再安装密码工具:
apt install morse2ascii
morse2ascii 音频名字
morse2ascii svega.mp3
audio | spectrum steganography
音频中的频谱隐写是将字符串隐藏在频谱中，此类音频通常会有一个较明显的特征，听起来是一段
杂音或者比较刺耳.打开 AUDACITY 工具，把音频文件拖进去
Audio | Reverse sound steganography
音频中的声音听起来有点诡异，并且完全听不懂.
左边点击选择，然后在菜单，点击效果->反向(时间)
Audio | LSB audio steganography
下载 Silenteye 工具:
https://achorein.github.io/silenteye使用 slienteye 工具 File 打开音频，点击 decode 解密
Learning link:3-CTF Steganography Basics_bilibili_bilibili