audiohide

audiohide is a CLI utility to hide files in audio files. Supports flac, ogg, mp3, and m4a. It will output the stegged file as wav. Outputting as wav doesn't lose quality on recompressing lossy formats.

How it Works

audiohide works by hiding the file to hide in the least significant bits of the raw PCM stream. It supports 8 and 16 bit-depths. Metadata is written to the tags (salt/IV for encryption, number of least significant bits/size for hidden file) and is retrieved during the unstegging process.

Requirements

You'll need the audio metadata library and a backend for audioread, ffmpeg should do just fine for the backend.

sudo apt install libtag1-dev

Then install the python requirements:

pip install -r requirements.txt

Usage

usage: audiohide.py [-h] [-s STEG] [-i INPUT_FILE] -o OUTPUT_FILE [-u UNSTEG] -p PASSWORD

Hide file in audio file

optional arguments:
  -h, --help            show this help message and exit
  -s STEG, --steg STEG  carrier audio file to steg
  -i INPUT_FILE, --input-file INPUT_FILE
                        file to hide
  -o OUTPUT_FILE, --output-file OUTPUT_FILE
                        output file
  -u UNSTEG, --unsteg UNSTEG
                        unsteg image
  -p PASSWORD, --password PASSWORD
                        password for encrypted data

Examples

Look in examples/ for stegged/unstegged files.

License

None, steg some audio and send secure files to friends, re-use the code freely.