Quick repo doing steganography, originally inspired from this repository: https://github.com/kelvins/steganography, but using bitwise operations with Pillow-SIMD.
As a more general solution, module linear_stegano.py is based on numpy arrays which is still substianlly faster.
You need Python 3.x for this project. I suggest using pyenv. Then you can create a virtual environment with
python -m venv .venvs/stegano
The activate it with
source .venvs/stegano/bin/activate.
Then install dependencies with
pip install -r requirements.txt
For quick and easy steganography I suggest using linear_stegano.py in the following way:
tl;dr:
python linear_stegano.py hide --base container.png --secret secret.jpg
and
python linear_stegano.py reveal --base steganographied.png
Consider you want to:
- Use myimage.wtv as the image that will contain the image NOT the secret
- Use secret.wtv as the image that will be hidden
python linear_stegano.py hide --base myimage.wtv --secret secret.wtv [--output name_of_output.png]
N.B: If specifying the optional --output, the file extension HAS to be .png. Specifying an output will overwrite a previous file with the same name
If no output is specified, a new file will be created for you with a suffix _hidden based on the input file name. For example, with the above example, the resulting output file name if not specified would be secret_hidden.png.
If no output is specified via --output and the resulting file name would clash with an already existing file, a new file name is attributed with the date and time of the operation. For example, if --output is not specified and file secret_hidden.png already exists, the output will be something like secret_hidden_2020-21-12-19-21-25.png.
Consider you want to:
- Use secret_hidden.png as the image that contains a secret
python linear_stegano.py reveal --base secret_hidden.png [--output name_of_output.png]
The same considerations for --output apply for the retrieval (except that instead of hidden the suffix is revealed). See this section.