asteg

Steganography : Hiding text or file inside an audio

DESCRIPTION

This program can be used for hiding text or a file inside an audio file. The program utilizes the high-frequency component of an audio file to embed its payload. Which is almost undetectable with the human ear. You will never notice any drop in audio quality.

INSTALLATION

From a command line enter the command to install asteg

pip install asteg

You need to have python 3 installed. asteg won't run on python 2.

USES

Hiding 'Hello World!' inside infile.mp3. The resultant file is outfile.wav

$ asteg -p -o outfile.wav -i infile.mp3 -t 'Hello world!'

Hiding secret.odt inside infile.mp3. The resultant file is outfile.wav

$ asteg -p -o outfile.wav -i infile.mp3 -f secret.odt

META

The data is formatted first before embedding inside the audio. First a 10 byte header is added at the beginning of the data. The header format is as follows:

Number of Bytes	Description
2	'aS' Always
1
4	Payload length
1	Length for filename for file embedding (7bit) + encryption flag (1bit)
1	Version of used program
1

DEPENDENCY

• pydub
• numpy
• scipy

CURRENT LIMITATIONS

• Does not support encryption. (Has plan to add)
• Generates uncompressed wav file. Which is too big.